%%% -*-BibTeX-*-
%%% ====================================================================
%%%  BibTeX-file{
%%%     author          = "Nelson H. F. Beebe",
%%%     version         = "0.15",
%%%     date            = "30 December 2000",
%%%     time            = "14:58:36 MST",
%%%     filename        = "lowdin-per-olov.bib",
%%%     address         = "Center for Scientific Computing
%%%                        University of Utah
%%%                        Department of Mathematics, 322 INSCC
%%%                        155 S 1400 E RM 233
%%%                        Salt Lake City, UT 84112-0090
%%%                        USA",
%%%     telephone       = "+1 801 581 5254",
%%%     FAX             = "+1 801 585 1640, +1 801 581 4148",
%%%     URL             = "http://www.math.utah.edu/~beebe",
%%%     checksum        = "12051 10688 45939 427652",
%%%     email           = "beebe at math.utah.edu, beebe at acm.org,
%%%                        beebe at computer.org, beebe at ieee.org
%%%                        (Internet)",
%%%     codetable       = "ISO/ASCII",
%%%     keywords        = "BibTeX, bibliography, kvantkemi, quantum
%%%                        chemistry",
%%%     supported       = "yes",
%%%     docstring       = "This is a bibliography of publications of
%%%                        the late Per-Olov Lowdin (28 October 1916 --
%%%                        6 October 2000).
%%%
%%%                        #############################################
%%%                        #############################################
%%%                        ## This bibliography is dedicated in fond  ##
%%%                        ## memory of, and to, Per-Olov Lowdin:     ##
%%%                        ## advisor, alpinist, friend, host,        ##
%%%                        ## leader, linear algebraist, mentor,      ##
%%%                        ## musician, role model, scientist,        ##
%%%                        ## and teacher of a great many of us in    ##
%%%                        ## his extended scientific family.         ##
%%%                        #############################################
%%%                        #############################################
%%%
%%%                        Coverage is expected to be nearly complete
%%%                        for material published in books and journals.
%%%                        However, there are a large number of Uppsala
%%%                        and Florida technical reports for which
%%%                        BibTeX entries are not yet available.
%%%
%%%                        At version 0.15, the year coverage looked
%%%                        like this:
%%%
%%%                             1939 (   1)    1960 (   4)    1981 (  12)
%%%                             1940 (   0)    1961 (   2)    1982 (  14)
%%%                             1941 (   0)    1962 (  14)    1983 (  13)
%%%                             1942 (   0)    1963 (  12)    1984 (   5)
%%%                             1943 (   0)    1964 (  14)    1985 (  12)
%%%                             1944 (   0)    1965 (  13)    1986 (  15)
%%%                             1945 (   0)    1966 (   9)    1987 (  12)
%%%                             1946 (   0)    1967 (   9)    1988 (  15)
%%%                             1947 (   2)    1968 (  14)    1989 (  16)
%%%                             1948 (   5)    1969 (   7)    1990 (  10)
%%%                             1949 (   1)    1970 (   9)    1991 (  18)
%%%                             1950 (   2)    1971 (   9)    1992 (  16)
%%%                             1951 (   7)    1972 (   7)    1993 (   8)
%%%                             1952 (   1)    1973 (   6)    1994 (  10)
%%%                             1953 (   3)    1974 (   6)    1995 (  11)
%%%                             1954 (   6)    1975 (   6)    1996 (   9)
%%%                             1955 (   7)    1976 (   7)    1997 (   8)
%%%                             1956 (   5)    1977 (  10)    1998 (   8)
%%%                             1957 (   2)    1978 (   9)    1999 (   6)
%%%                             1958 (   9)    1979 (   2)    2000 (   4)
%%%                             1959 (   6)    1980 (  11)
%%%                             19xx (  10)
%%%
%%%                             Article:        272
%%%                             Book:            44
%%%                             InCollection:    15
%%%                             InProceedings:   30
%%%                             Misc:             1
%%%                             PhdThesis:        1
%%%                             Proceedings:     66
%%%                             TechReport:      30
%%%                             Unpublished:     10
%%%
%%%                             Total entries:  469
%%%
%%%                        The necessary diaeresis on the letter ``o''
%%%                        in the family name is omitted in this comment
%%%                        header for technical reasons.  It is properly
%%%                        preserved in all text that can be typeset
%%%                        from the BibTeX entries.  Unlike in German,
%%%                        it is not customary in Swedish to reduce this
%%%                        letter to oe when the diaeresis is
%%%                        unavailable.  Nevertheless, English-language
%%%                        databases often make this reduction.
%%%
%%%                        The two research groups which Per-Olov Lowdin
%%%                        founded, and then led for nearly forty years,
%%%                        have World-Wide Web sites at
%%%
%%%                            http://www.kvac.uu.se/   (Uppsala)
%%%                            http://www.qtp.ufl.edu/  (Gainesville)
%%%
%%%                        Per-Olov Lowdin was the ``propagator'' of a
%%%                        huge number of scientific exchanges, thanks
%%%                        to the Sanibel Conferences (which celebrated
%%%                        their 40th anniversary in March 2000), to the
%%%                        Summer Schools in Sweden and Norway, and to
%%%                        the Winter Schools in Florida.  More than 5000
%%%                        different scientists have participated in these
%%%                        conferences and schools.
%%%
%%%                        His two home institutions, plus the
%%%                        University of Aarhus in Aarhus, Denmark, and
%%%                        the University of Utah, in Salt Lake City,
%%%                        Utah, USA have enjoyed particularly close
%%%                        collaboration.  It was at the latter that
%%%                        this bibliography was developed, using
%%%                        several different data sources; they are
%%%                        credited in bibsource values in the BibTeX
%%%                        entries.
%%%
%%%                        English translations are provided for titles
%%%                        of articles written in French (1) and Swedish
%%%                        (10).
%%%
%%%                        Data for this bibliography has been collected
%%%                        from several sources, credited in bibsource
%%%                        values in the BibTeX entries:
%%%
%%%                            Compendex database (1970--1999)
%%%                            IEEE INSPEC database (1968--2000)
%%%                            MathSciNet database (1940--2000)
%%%                            MEDLINE database (1966--2000)
%%%                            OCLC ArticleFirst database (ca. 1990--2000)
%%%                            OCLC WorldCat database (ca. 1990--2000)
%%%                            Science Citation Index database (1980--2000)
%%%                            University of California MELVYL catalog
%%%                            U.S. Library of Congress
%%%                            Zentralblatt Math database (1931--2000)
%%%                            ftp://ftp.math.utah.edu/pub/tex/bib/ijqc.bib
%%%                            ftp://ftp.math.utah.edu/pub/tex/bib/jmathphys1980.bib
%%%                            ftp://ftp.math.utah.edu/pub/tex/bib/master.bib
%%%                            http://falcon.kvac.uu.se/swe/personal/PerOlovLowdinPub.html
%%%                            http://www3.interscience.wiley.com/journalfinder.html
%%%                            nhfb-allref.bib (an unreleased bibliography of original papers)
%%%
%%%                        The University of California MELVYL catalog
%%%                        has been particularly helpful for information
%%%                        about books, and for names, and CODEN and
%%%                        ISSN data, of periodicals; the people of the
%%%                        State of California are gratefully
%%%                        acknowledged for making it available on the
%%%                        Internet.
%%%
%%%                        There are far too many errors in these
%%%                        sources, but by merging data from multiple
%%%                        databases, and using majority vote to eliminate
%%%                        discrepancies, many of the errors have been
%%%                        repaired.
%%%
%%%                        Several tedious hours of searching physical
%%%                        journal issues at the University of Utah
%%%                        Marriott Library provided additional data
%%%                        (typically for issue numbers, months, and
%%%                        final page numbers), and corrections.
%%%
%%%                        Despite these extensive efforts, at version
%%%                        0.10 of 16-Dec-2000, 142 entries out of 430
%%%                        still contain errors or missing values, as
%%%                        evidenced by paired queries in string values,
%%%                        or keys beginning with `xx'.
%%%
%%%                        It is regrettably common for bibliographic
%%%                        databases to reduce full names to initials
%%%                        plus family names.  The STRONG preference in
%%%                        this bibliography is to preserve author names
%%%                        EXACTLY as they appeared in the original
%%%                        publication.  It is the job of bibliographic
%%%                        formatting software to later reduce names to
%%%                        initials, if the bibliography style requires
%%%                        it.  The original bibliographic data retains
%%%                        the complete information.
%%%
%%%                        In the chemistry and physics literature, it
%%%                        is common for reference lists in papers to
%%%                        omit article titles, and often, issue
%%%                        numbers, publication months, and final page
%%%                        numbers.  This deplorable practice makes such
%%%                        published bibliographies utterly useless for
%%%                        bibliographic archiving and search, makes it
%%%                        harder for a human to find papers in bound
%%%                        volumes (there are journals that publish more
%%%                        than 20,000 pages annually in a single
%%%                        `volume'), and makes it all but impossible
%%%                        for the reader to relate a bibliography entry
%%%                        to a publication that the reader is familiar
%%%                        with: people remember words, not numbers!
%%%                        This bibliography file strives to provide
%%%                        COMPLETE publication information.
%%%
%%%                        Similarly, it is common for reference lists
%%%                        to abbreviate journal names, sometimes to the
%%%                        point of unintelligibility.  In the days when
%%%                        bibliographies were typed (and retyped) by
%%%                        hand on mechanical typewriters, such
%%%                        practices were perhaps understandable,
%%%                        however much one may deplore the laziness.
%%%
%%%                        With computer representation of publication
%%%                        data in properly, and rigorously, marked-up
%%%                        bibliographic databases, happily, such
%%%                        practices can now be abandoned.
%%%
%%%                        In this BibTeX file, most journal names are
%%%                        given with BibTeX string abbreviations that
%%%                        are defined to expand to FULL journal names.
%%%
%%%                        The journal abbreviation name begins with
%%%                        `j-' (for journal), followed by the uppercase
%%%                        equivalent of a common journal abbreviation,
%%%                        with punctuation eliminated.
%%%
%%%                        Thus, j-ADV-CHEM-PHYS represents the journal
%%%                        ``Advances in Chemical Physics'', abbreviated
%%%                        as ``Adv. Chem. Phys.''.
%%%
%%%                        Notice that a human possessing only the
%%%                        abbreviation might reasonably, but wrongly,
%%%                        guess that it represents ``Advances in
%%%                        Chemistry and Physics'', or ``Adventures in
%%%                        Chemical Physiology''!
%%%
%%%                        Despite popular beliefs of researchers, there
%%%                        are no universal standards for abbreviating
%%%                        journal names: several professional societies
%%%                        and publishers produce such abbreviation
%%%                        lists, but there is widespread disagreement
%%%                        among them.
%%%
%%%                        Where journal values in BibTeX entries remain
%%%                        in this file as quoted strings, rather than
%%%                        as BibTeX string names, sufficient library
%%%                        catalog information has yet to be found to
%%%                        uniquely identify the journal, and obtain its
%%%                        Chemical Abstracts serial publication
%%%                        identifier (the CODEN), and the International
%%%                        Standard Serial Number (the ISSN).  The
%%%                        latter have been assigned since 1972 to
%%%                        virtually all periodicals regularly published
%%%                        throughout the world, and as such, provide a
%%%                        unique periodical identifier for databases
%%%                        and library catalogs.
%%%
%%%                        The checksum field above contains a CRC-16
%%%                        checksum as the first value, followed by the
%%%                        equivalent of the standard UNIX wc (word
%%%                        count) utility output of lines, words, and
%%%                        characters.  This is produced by Robert
%%%                        Solovay's checksum utility.",
%%%  }
%%% ====================================================================

%%----------------------------------------------------------------------
%% Acknowledgement abbreviations:

@String{ack-nhfb = "Nelson H. F. Beebe,
                    Center for Scientific Computing,
                    University of Utah,
                    Department of Mathematics, 322 INSCC,
                    155 S 1400 E RM 233,
                    Salt Lake City, UT 84112-0090, USA,
                    Tel: +1 801 581 5254,
                    FAX: +1 801 585 1640, +1 801 581 4148,
                    e-mail: \path|beebe@math.utah.edu|,
                            \path|beebe@acm.org|,
                            \path|beebe@computer.org|,
                            \path|beebe@ieee.org| (Internet),
                    URL: \path|http://www.math.utah.edu/~beebe/|"}

%%----------------------------------------------------------------------
%% Institution abbreviations:

@String{inst-KKUU               = "Kvantkemi, Uppsala Universitet"}

@String{inst-KKUU:adr           = "Uppsala, Sweden"}

@String{inst-QTP                = "Quantum Theory Project, Departments of
                                  Chemistry and Physics, University of
                                  Florida"}

@String{inst-QTP:adr            = "Gainesville, FL 32611-8435, USA"}

%%----------------------------------------------------------------------
%% Journal abbreviations:

@String{j-ABSTR-PAP-AM-CHEM-SOC = "Abstracts of Papers of the American
                                  Chemical Society"}

@String{j-ACTA-PHYS-ACAD-SCI-HUNG = "Acta physica Academiae Scientiarum
                                  Hungaricae"}

@String{j-ACTA-POLYTECH-SCAND-ELECTR-ENG-SER = "Acta Polytechnica
                                  Scandinavica, Electrical Engineering Series"}

@String{j-ADV-CHEM-PHYS         = "Advances in Chemical Physics"}

@String{j-ADV-PHYS              = "Advances in Physics"}

@String{j-ADV-QUANTUM-CHEM      = "Advances in quantum chemistry"}

@String{j-ANN-NY-ACAD-SCI       = "Annals of the New York Academy of Sciences"}

@String{j-ANN-REV-PHYS-CHEM     = "Annual Review of Physical Chemistry"}

@String{j-ARKIV-FYSIK           = "Arkiv f{\"o}r fysik / utgivet av K. Svenska
                                  Vetenskapsakademien"}

@String{j-ARKIV-MAT-ASTRON-FYSIK = "Arkiv f{\"o}r matematik, astronomi och
                                  fysik, utgivet av K. Svenska
                                  vetenskapsakademien"}

@String{j-BIOPOLYMERS-SYMPOSIA  = "Biopolymers Symposia"}

@String{j-CHEM-PHYS-LETT        = "Chemical Physics Letters"}

@String{j-CURR-CONTENTS-ENG-TECH-APPL-SCI = "Current contents. Engineering,
                                  technology \& applied sciences"}

@String{j-CURR-CONTENTS-PHYS-CHEM-EARTH-SCI = "Current Contents: Physical,
                                  Chemical \& Earth Sciences"}

@String{j-ELEMENTA-TMFK         = "Elementa: tidskrift for matematik, fysik
                                  och kemi"}

@String{j-FOUND-PHYS            = "Foundations of Physics"}

@String{j-IJQC                  = "International Journal of Quantum Chemistry"}

@String{j-IJQC-BIO-SYMP         = "International Journal of Quantum Chemistry.
                                  Quantum Biology Symposium: Proceedings of
                                  the International Symposium on Quantum
                                  Biology and Quantum Pharmacology."}

@String{j-IJQC-QC-SYMP          = "International Journal of Quantum Chemistry.
                                  Quantum Chemistry Symposium"}

@String{j-IJQC-SYMP             = "International Journal of Quantum Chemistry.
                                  Symposium"}

@String{j-INT-SCI-TECHNOL       = "International Science and Technology"}

@String{j-ISRAEL-J-CHEM         = "Israel Journal of Chemistry"}

@String{j-J-APPL-PHYS           = "Journal of Applied Physics"}

@String{j-J-CHEM-PHYS           = "Journal of Chemical Physics"}

@String{j-J-MATH-CHEM           = "Journal of Mathematical Chemistry"}

@String{j-J-MATH-PHYS           = "Journal of Mathematical Physics"}

@String{j-J-MOL-SPECTROSC       = "Journal of Molecular Spectroscopy"}

@String{j-J-MOL-STRUCT          = "Journal of Molecular Structure"}

@String{j-J-NONMETALS           = "Journal of Nonmetals"}

@String{j-J-PHYS-C              = "Journal of Physics C: Solid State Physics"}

@String{j-J-PHYS-CHEM           = "Journal of Physical Chemistry"}

@String{j-J-PHYS-CHEM-SOLIDS    = "Journal of Physics and Chemistry of Solids"}

@String{j-M-FIZ-F               = "Magyar Fizikai Folyoirat"}

@String{j-MOL-PHYS              = "Molecular Physics"}

@String{j-MUTAT-RES             = "Mutation Research"}

@String{j-PHYS-REV              = "Physical Review"}

@String{j-PHYS-REV-2            = "Physical Review, Series 2"}

@String{j-PHYSICA-SCRIPTA       = "Physica Scripta"}

@String{j-PROC-AMER-PHIL-SOC    = "Proceedings of the {American Philosophical
                                  Society} held at {Philadelphia} for
                                  promoting useful knowledge"}

@String{j-PROC-INDIAN-ACAD-SCI-CHEM-SCI = "Proceedings of the Indian Academy
                                  of Sciences. Chemical sciences."}

@String{j-PURE-APPL-CHEM        = "Pure and Applied Chemistry"}

@String{j-QUART-APPL-MATH       = "Quarterly of Applied Mathematics"}

@String{j-REV-MOD-PHYS          = "Reviews of Modern Physics"}

@String{j-SVENSK-KEMISK-TIDSKRIFT = "Svensk kemisk tidskrift"}

@String{j-SVENSK-NATURVETENSKAP = "Svensk naturvetenskap"}

@String{j-TEX-J-SCI             = "Texas Journal of Science"}

@String{j-THEOR-CHEM-ACCOUNTS   = "Theoretical Chemistry Accounts"}

@String{j-THEOR-CHIM-ACTA       = "Theoretica Chimica Acta"}

@String{j-Z-PHYS-CHEM-LEIPZIG   = "Zeitschrift f{\"u}r physikalische Chemie
                                  (Leipzig)"}

%%----------------------------------------------------------------------
%% Publisher abbreviations:

@String{pub-ADENINE-PRESS       = "Adenine Press"}

@String{pub-ADENINE-PRESS:adr   = "Guilderland, NY, USA"}

@String{pub-AIP                 = "American Institute of Physics"}

@String{pub-AIP:adr             = "Woodbury, NY, USA"}

@String{pub-ALMQVIST-WIKSELLS   = "Almqvist and Wiksell"}

@String{pub-ALMQVIST-WIKSELLS:adr = "Uppsala, Sweden"}

@String{pub-AP                  = "Academic Press Inc."}

@String{pub-AP:adr              = "New York, USA"}

@String{pub-AW                  = "Ad{\-d}i{\-s}on-Wes{\-l}ey"}

@String{pub-AW:adr              = "Reading, MA, USA"}

@String{pub-ELSEVIER            = "Elsevier"}

@String{pub-ELSEVIER:adr        = "Amsterdam, The Netherlands"}

@String{pub-INTERSCIENCE        = "Interscience Publishers"}

@String{pub-INTERSCIENCE:adr    = "New York, NY, USA"}

@String{pub-KLUWER              = "Kluwer Academic Publishers Group"}

@String{pub-KLUWER:adr          = "Norwell, MA, USA, and Dordrecht,
                                  The Netherlands"}

@String{pub-PLENUM              = "Plenum Press"}

@String{pub-PLENUM:adr          = "New York, NY, USA; London, UK"}

@String{pub-REIDEL              = "D. Reidel"}

@String{pub-REIDEL:adr          = "Dordrecht, Boston, Lancaster, Tokyo"}

@String{pub-SV                  = "Spring{\-}er-Ver{\-}lag"}

@String{pub-SV:adr              = "Berlin, Germany~/ Heidelberg,
                                  Germany~/ London, UK~/ etc."}

@String{pub-WILEY               = "John Wiley and Sons, Inc."}

@String{pub-WILEY:adr           = "New York, NY, USA"}

%%----------------------------------------------------------------------
%% Series abbreviations:

@String{ser-IJQC                = "International journal of quantum chemistry"}

@String{ser-IJQC-QBS            = "International journal of quantum chemistry.
                                  Quantum biology symposium"}

@String{ser-IJQC-QCS            = "International journal of quantum chemistry.
                                  Quantum chemistry symposium"}

@String{ser-IJQC-SYMP           = "International journal of quantum chemistry.
                                  Symposium"}

%%----------------------------------------------------------------------
%% Bibliography entries, in ascending year order, alphabetical by
%% citation label within each (e.g., with "bibsort -byyear"):

@Article{Lowdin:1939:LTO,
  author =       "Per-Olov L{\"o}wdin",
  title =        "{Lorentz}-Transformationen och den Kinematiska
                 Relativitetsprincipen. ({Swedish}) [{The Lorentz}
                 Transformation and the Kinematic Relativity
                 Principle]",
  journal =      j-ELEMENTA-TMFK,
  volume =       "22",
  number =       "??",
  pages =        "161--169",
  year =         "1939",
  CODEN =        "EMNTAE",
  ISSN =         "0013-5933",
  bibdate =      "Fri Nov 17 08:02:05 2000",
  bibsource =    "http://falcon.kvac.uu.se/swe/personal/PerOlovLowdinPub.html",
  acknowledgement = ack-nhfb,
  language =     "Swedish",
}

@TechReport{Lowdin:1947:CRC,
  author =       "Per-Olov L{\"o}wdin",
  title =        "Contributions to the Report from the Conference of the
                 {Swedish National Committee for Physics}",
  type =         "Technical report",
  institution =  "????",
  address =      "????",
  year =         "1947",
  bibdate =      "Fri Nov 17 08:10:08 2000",
  bibsource =    "http://falcon.kvac.uu.se/swe/personal/PerOlovLowdinPub.html",
  acknowledgement = ack-nhfb,
}

@Article{Lowdin:1947:QMC,
  author =       "P.-O. L{\"o}wdin",
  title =        "A Quantum Mechanical Calculation of the Cohesive
                 Energy, the Interionic Distance, and the Elastic
                 Constants of Some Ionic Crystals",
  journal =      j-ARKIV-MAT-ASTRON-FYSIK,
  volume =       "251",
  number =       "??",
  pages =        "1--??",
  year =         "1947",
  CODEN =        "AMAFAX",
  ISSN =         "0365-4133",
  bibdate =      "Fri Dec 15 17:40:52 2000",
  bibsource =    "nhfb-allref.bib",
  acknowledgement = ack-nhfb,
  journalabr =   "Arkiv Mat. Astron. Fysik",
  xxnote =       "Check this: not in
                 http://falcon.kvac.uu.se/swe/personal/PerOlovLowdinPub.html
                 for this volume/year/pages?? The volume is out-of-range
                 for this journal. This entry may be equivalent to
                 \cite{Lowdin:1948:QMCa,Lowdin:1948:QMCb}.",
}

@TechReport{Lowdin:1948:CRC,
  author =       "Per-Olov L{\"o}wdin",
  title =        "Contributions to the Report from the Conference of the
                 {Swedish National Committee for Physics}",
  type =         "Technical report",
  institution =  "????",
  address =      "????",
  year =         "1948",
  bibdate =      "Fri Nov 17 08:10:08 2000",
  bibsource =    "http://falcon.kvac.uu.se/swe/personal/PerOlovLowdinPub.html",
  acknowledgement = ack-nhfb,
}

@Article{Lowdin:1948:QMCa,
  author =       "Per-Olov L{\"o}wdin",
  title =        "A quantum mechanical calculation of the cohesive
                 energy, the interionic distance, and the elastic
                 constants of some ionic crystals. {I}",
  journal =      j-ARKIV-MAT-ASTRON-FYSIK,
  volume =       "35A",
  number =       "9",
  pages =        "1--10",
  year =         "1948",
  CODEN =        "AMAFAX",
  ISSN =         "0365-4133",
  bibdate =      "Fri Dec 15 17:40:57 2000",
  bibsource =    "http://falcon.kvac.uu.se/swe/personal/PerOlovLowdinPub.html;
                 Zentralblatt Math database",
  acknowledgement = ack-nhfb,
  keywords =     "Structure of matter",
  source =       "Ark. Mat. Astron. Fys. A 35, No.9, 10 p. (1948).",
  ZMnumber =     "030.09501",
}

@Article{Lowdin:1948:QMCb,
  author =       "Per-Olov L{\"o}wdin",
  title =        "A quantum mechanical calculation of the cohesive
                 energy, the interionic distance, and the elastic
                 constants of some ionic crystals. {II}. {The} Elastic
                 Constants $c_{12}$ and $c_{44}$",
  journal =      j-ARKIV-MAT-ASTRON-FYSIK,
  volume =       "35A",
  number =       "30",
  pages =        "1--18",
  year =         "1948",
  CODEN =        "AMAFAX",
  ISSN =         "0365-4133",
  bibdate =      "Fri Nov 17 07:07:31 2000",
  bibsource =    "http://falcon.kvac.uu.se/swe/personal/PerOlovLowdinPub.html",
  acknowledgement = ack-nhfb,
  ZMnumber =     "030.09501",
}

@PhdThesis{Lowdin:1948:TISa,
  author =       "P.-O. L{\"o}wdin",
  title =        "A Theoretical Investigation Into Some Properties of
                 Ionic Crystals",
  type =         "Dissertation",
  school =       "??, Uppsala Universitet",
  address =      "Uppsala, Sweden",
  pages =        "126",
  year =         "1948",
  bibdate =      "Thu Nov 16 12:07:42 2000",
  bibsource =    "nhfb-allref.bib",
  acknowledgement = ack-nhfb,
}

@Book{Lowdin:1948:TISb,
  author =       "Per-Olov L{\"o}wdin",
  title =        "A theoretical investigation into some properties of
                 ionic crystals: a quantum mechanical treatment of the
                 cohesive energy, the interionic distance, the elastic
                 constants, and the compression at high pressures, with
                 numerical applications to some alkali halides",
  publisher =    pub-ALMQVIST-WIKSELLS,
  address =      pub-ALMQVIST-WIKSELLS:adr,
  pages =        "xi + 126 + 1",
  year =         "1948",
  LCCN =         "QB 498 349 (??)",
  bibdate =      "Thu Nov 16 14:42:12 MST 2000",
  bibsource =    "University of California MELVYL catalog",
  acknowledgement = ack-nhfb,
  annote =       "Extra t.p. with thesis statement inserted. Addendum
                 and errata on leaf inserted. Inaug. diss.--Uppsala.",
  keywords =     "crystallography, mathematical",
}

@TechReport{Lowdin:1949:CRC,
  author =       "Per-Olov L{\"o}wdin",
  title =        "Contributions to the Report from the Conference of the
                 {Swedish National Committee for Physics}",
  type =         "Technical report",
  institution =  "????",
  address =      "????",
  year =         "1949",
  bibdate =      "Fri Nov 17 08:10:08 2000",
  bibsource =    "http://falcon.kvac.uu.se/swe/personal/PerOlovLowdinPub.html",
  acknowledgement = ack-nhfb,
}

@Article{Lowdin:1950:NMS,
  author =       "Per-Olov L{\"o}wdin",
  title =        "A note on the method of steepest descents with a
                 remark on {T. Ljunggren}'s paper {``Contributions to
                 the theory of diffraction of electromagnetic waves by
                 spherical particles.''}",
  journal =      j-ARKIV-FYSIK,
  volume =       "2",
  number =       "36",
  pages =        "367--370",
  year =         "1950",
  CODEN =        "AFYSA7",
  ISSN =         "0365-2440",
  MRclass =      "78.0X",
  MRnumber =     "12,884e",
  MRreviewer =   "C. J. Bouwkamp",
  bibdate =      "Thu Nov 16 11:51:44 MST 2000",
  bibsource =    "http://falcon.kvac.uu.se/swe/personal/PerOlovLowdinPub.html;
                 MathSciNet database; Zentralblatt Math database",
  acknowledgement = ack-nhfb,
  journalabr =   "Ark. Fys.",
  keywords =     "{optics}",
  ZMnumber =     "040.27602",
}

@Article{Lowdin:1950:NOP,
  author =       "Per-Olov L{\"o}wdin",
  title =        "On the Non-Orthogonality problem Connected with the
                 Use of Atomic Wave Functions in the Theory of Molecules
                 and Crystals",
  journal =      j-J-CHEM-PHYS,
  volume =       "18",
  number =       "3",
  pages =        "365--375",
  month =        mar,
  year =         "1950",
  CODEN =        "JCPSA6",
  ISSN =         "0021-9606",
  bibdate =      "Fri Dec 15 18:32:38 2000",
  bibsource =    "http://falcon.kvac.uu.se/swe/personal/PerOlovLowdinPub.html",
  acknowledgement = ack-nhfb,
}

@Article{Lowdin:1951:LEC,
  author =       "Per-Olov L{\"o}wdin",
  title =        "Letter to the Editor: Calculation of Electric Dipole
                 Moments of Some Heterocyclics",
  journal =      j-J-CHEM-PHYS,
  volume =       "19",
  number =       "10",
  pages =        "1323--1324",
  month =        oct,
  year =         "1951",
  CODEN =        "JCPSA6",
  ISSN =         "0021-9606",
  bibdate =      "Fri Dec 15 18:33:12 2000",
  bibsource =    "http://falcon.kvac.uu.se/swe/personal/PerOlovLowdinPub.html",
  acknowledgement = ack-nhfb,
}

@TechReport{Lowdin:1951:MNI,
  author =       "P.-O. L{\"o}wdin",
  title =        "On the Methods of Numerical Integration Used in
                 Determining Self-Consistent Fields",
  type =         "Shelter Island Conference, NAS-ONR Report",
  institution =  "Office of Naval Research",
  address =      "Washington, DC, USA (??)",
  pages =        "187--194",
  year =         "1951",
  bibdate =      "Thu Nov 16 12:07:42 2000",
  bibsource =    "http://falcon.kvac.uu.se/swe/personal/PerOlovLowdinPub.html;
                 nhfb-allref.bib",
  acknowledgement = ack-nhfb,
}

@Article{Lowdin:1951:NNC,
  author =       "Per-Olov L{\"o}wdin and Alf Sj{\"o}lander",
  title =        "A note on the numerical calculation of asymptotic
                 phases with a numerical study of {Hulth{\'e}n}'s
                 variational principle",
  journal =      j-ARKIV-FYSIK,
  volume =       "3",
  number =       "11",
  pages =        "155--166",
  year =         "1951",
  CODEN =        "AFYSA7",
  ISSN =         "0365-2440",
  MRclass =      "65.0X",
  MRnumber =     "13,388i",
  MRreviewer =   "H. O. Hartley",
  bibdate =      "Thu Nov 16 11:51:44 MST 2000",
  bibsource =    "http://falcon.kvac.uu.se/swe/personal/PerOlovLowdinPub.html;
                 MathSciNet database; Zentralblatt Math database",
  acknowledgement = ack-nhfb,
  journalabr =   "Ark. Fys.",
  keywords =     "quantum theory",
  ZMnumber =     "042.45303",
}

@Article{Lowdin:1951:NQM,
  author =       "Per-Olov L{\"o}wdin",
  title =        "A note on the quantum-mechanical perturbation theory",
  journal =      j-J-CHEM-PHYS,
  volume =       "19",
  number =       "11",
  pages =        "1396--1401",
  month =        nov,
  year =         "1951",
  CODEN =        "JCPSA6",
  ISSN =         "0021-9606",
  MRclass =      "81.0X",
  MRnumber =     "13,892e",
  MRreviewer =   "E. Gora",
  bibdate =      "Fri Dec 15 18:33:22 2000",
  bibsource =    "http://falcon.kvac.uu.se/swe/personal/PerOlovLowdinPub.html;
                 MathSciNet database",
  acknowledgement = ack-nhfb,
}

@Article{Lowdin:1951:QMCa,
  author =       "Per-Olov L{\"o}wdin",
  title =        "On the Quantum-Mechanical Calculation of the Cohesive
                 Energy of Molecules and Crystals. {Part I}. {A} General
                 Energy Formula for the Ground State",
  journal =      j-J-CHEM-PHYS,
  volume =       "19",
  number =       "12",
  pages =        "1570--1578",
  month =        dec,
  year =         "1951",
  CODEN =        "JCPSA6",
  ISSN =         "0021-9606",
  bibdate =      "Fri Dec 15 18:33:37 2000",
  bibsource =    "http://falcon.kvac.uu.se/swe/personal/PerOlovLowdinPub.html",
  acknowledgement = ack-nhfb,
}

@Article{Lowdin:1951:QMCb,
  author =       "Per-Olov L{\"o}wdin",
  title =        "On the Quantum-Mechanical Calculation of the Cohesive
                 Energy of Molecules and Crystals. {Part II}.
                 {Treatment} of the Alkali metals with Numerical
                 Applications to Sodium",
  journal =      j-J-CHEM-PHYS,
  volume =       "19",
  number =       "12",
  pages =        "1579--1591",
  month =        dec,
  year =         "1951",
  CODEN =        "JCPSA6",
  ISSN =         "0021-9606",
  bibdate =      "Fri Dec 15 18:33:54 2000",
  bibsource =    "http://falcon.kvac.uu.se/swe/personal/PerOlovLowdinPub.html",
  acknowledgement = ack-nhfb,
}

@Article{Lundqvist:1951:CCI,
  author =       "Stig O. Lundqvist and Per-Olov L{\"o}wdin",
  title =        "On the calculation of certain integrals occurring in
                 the theory of molecules, especially three-centre and
                 four-centre integrals",
  journal =      j-ARKIV-FYSIK,
  volume =       "3",
  number =       "10",
  pages =        "147--154",
  year =         "1951",
  CODEN =        "AFYSA7",
  ISSN =         "0365-2440",
  MRclass =      "33.0X",
  MRnumber =     "13,130b",
  MRreviewer =   "A. Erd{\'e}lyi",
  bibdate =      "Thu Nov 16 11:51:44 MST 2000",
  bibsource =    "http://falcon.kvac.uu.se/swe/personal/PerOlovLowdinPub.html;
                 MathSciNet database; Zentralblatt Math database",
  acknowledgement = ack-nhfb,
  journalabr =   "Ark. Fys.",
  keywords =     "structure of matter",
  ZMnumber =     "043.22502",
}

@Article{Lowdin:1952:NIO,
  author =       "Per-Olov L{\"o}wdin",
  title =        "On the numerical integration of ordinary differential
                 equations of the first order",
  journal =      j-QUART-APPL-MATH,
  volume =       "10",
  number =       "2",
  pages =        "97--111",
  month =        jul,
  year =         "1952",
  CODEN =        "QAMAAY",
  ISSN =         "0033-569X",
  MRclass =      "65.0X",
  MRnumber =     "14,413d",
  MRreviewer =   "W. E. Milne",
  bibdate =      "Fri Dec 15 19:28:33 2000",
  bibsource =    "http://falcon.kvac.uu.se/swe/personal/PerOlovLowdinPub.html;
                 MathSciNet database; Zentralblatt Math database",
  acknowledgement = ack-nhfb,
  keywords =     "numerical analysis",
  ZMnumber =     "046.13402",
}

@Article{Lowdin:1953:LEA,
  author =       "Per-Olov L{\"o}wdin",
  title =        "Letter to the Editor: Approximate formulas for
                 many-center integrals in the theory of molecules and
                 crystals",
  journal =      j-J-CHEM-PHYS,
  volume =       "21",
  number =       "2",
  pages =        "374--375",
  month =        feb,
  year =         "1953",
  CODEN =        "JCPSA6",
  ISSN =         "0021-9606",
  MRclass =      "65.0X",
  MRnumber =     "14,693b",
  bibdate =      "Fri Dec 15 18:34:28 2000",
  bibsource =    "http://falcon.kvac.uu.se/swe/personal/PerOlovLowdinPub.html;
                 MathSciNet database",
  acknowledgement = ack-nhfb,
}

@Article{Lowdin:1953:MOT,
  author =       "Per-Olov L{\"o}wdin",
  title =        "On the Molecular-Orbital Theory of Conjugated Organic
                 Compounds with Application to the Perturbed Benzene
                 Ring",
  journal =      j-J-CHEM-PHYS,
  volume =       "21",
  number =       "3",
  pages =        "496--515",
  month =        mar,
  year =         "1953",
  CODEN =        "JCPSA6",
  ISSN =         "0021-9606",
  bibdate =      "Fri Dec 15 18:34:36 2000",
  bibsource =    "http://falcon.kvac.uu.se/swe/personal/PerOlovLowdinPub.html",
  acknowledgement = ack-nhfb,
}

@Article{Lowdin:1953:SAS,
  author =       "Per-Olov L{\"o}wdin",
  title =        "Studies of atomic self-consistent fields. {I}.
                 {Calculation} of {Slater} functions",
  journal =      j-PHYS-REV,
  volume =       "90",
  number =       "1",
  pages =        "120--125",
  day =          "1",
  month =        apr,
  year =         "1953",
  CODEN =        "PHRVAO",
  ISSN =         "0031-899X",
  bibdate =      "Tue Dec 26 12:44:35 2000",
  bibsource =    "http://falcon.kvac.uu.se/swe/personal/PerOlovLowdinPub.html;
                 Zentralblatt Math database",
  acknowledgement = ack-nhfb,
  keywords =     "Structure of matter",
  ZMnumber =     "050.23206",
}

@InProceedings{Lowdin:1954:CMI,
  author =       "Per-Olov L{\"o}wdin",
  booktitle =    "Symposium on Molecular Physics at Nikko, Japan in
                 1953",
  title =        "Calculations of Molecular Integrals in {Uppsala}",
  publisher =    "Maruzen",
  address =      "Tokyo, Japan",
  pages =        "113--117",
  year =         "1954",
  LCCN =         "????",
  bibdate =      "Tue Dec 26 12:38:38 2000",
  bibsource =    "http://falcon.kvac.uu.se/swe/personal/PerOlovLowdinPub.html",
  acknowledgement = ack-nhfb,
}

@InProceedings{Lowdin:1954:MAM,
  author =       "Per-Olov L{\"o}wdin",
  booktitle =    "Symposium on Molecular Physics at Nikko, Japan in
                 1953",
  title =        "A Method of Alternant Molecular Orbitals",
  publisher =    "????",
  address =      "????",
  pages =        "13--16",
  year =         "1954",
  LCCN =         "????",
  bibdate =      "Fri Nov 17 08:23:48 2000",
  bibsource =    "http://falcon.kvac.uu.se/swe/personal/PerOlovLowdinPub.html",
  acknowledgement = ack-nhfb,
}

@Article{Lowdin:1954:NEE,
  author =       "Per-Olov L{\"o}wdin and H. Sponer",
  title =        "Les Niveaux d'Energie Electronique dans l'Ethylene",
  journal =      "Le Journal de physique et le radium. Series 8",
  volume =       "15",
  number =       "??",
  pages =        "607--611",
  year =         "1954",
  bibdate =      "Fri Dec 15 19:38:29 2000",
  bibsource =    "http://falcon.kvac.uu.se/swe/personal/PerOlovLowdinPub.html",
  acknowledgement = ack-nhfb,
  journalabr =   "J. Phys. Radium",
  xxCODEN =      "none",
  xxISSN =       "none",
  xxnote =       "Check author order??",
}

@InProceedings{Lowdin:1954:RSM,
  author =       "Per-Olov L{\"o}wdin",
  booktitle =    "Proceedings of the International Conference of
                 Theoretical Physics in Japan",
  title =        "Recent Simplifications in the Molecular Orbital Theory
                 of Calculating Energy Levels",
  publisher =    "????",
  address =      "????",
  pages =        "599--611",
  month =        sep,
  year =         "1954",
  bibdate =      "Fri Nov 17 08:22:37 2000",
  bibsource =    "http://falcon.kvac.uu.se/swe/personal/PerOlovLowdinPub.html",
  acknowledgement = ack-nhfb,
}

@Article{Lowdin:1954:SAS,
  author =       "Per-Olov L{\"o}wdin",
  title =        "Studies of atomic self-consistent fields. {II}.
                 {Interpolation} problems",
  journal =      j-PHYS-REV,
  volume =       "94",
  number =       "6",
  pages =        "1600--1609",
  day =          "15",
  month =        jun,
  year =         "1954",
  CODEN =        "PHRVAO",
  ISSN =         "0031-899X",
  bibdate =      "Tue Dec 26 12:44:39 2000",
  bibsource =    "http://falcon.kvac.uu.se/swe/personal/PerOlovLowdinPub.html;
                 Zentralblatt Math database",
  acknowledgement = ack-nhfb,
  keywords =     "Structure of matter",
  ZMnumber =     "056.23003",
}

@TechReport{Lowdin:1954:U,
  author =       "Per-Olov L{\"o}wdin",
  title =        "Unknown",
  type =         "Quarterly Report",
  number =       "4",
  institution =  "Solid-State and Molecular Theory Group, MIT",
  address =      "Cambridge, MA, USA",
  pages =        "1--??",
  month =        "????",
  year =         "1954",
  bibdate =      "Tue Dec 26 12:08:43 2000",
  acknowledgement = ack-nhfb,
  xxnote =       "What was the title of this report?? Cited in
                 Theoretica Chimica Acta {\bf 103}(3--4) 238--241
                 (2000).",
}

@InProceedings{Lowdin:1955:EHF,
  author =       "Per-Olov L{\"o}wdin",
  booktitle =    "Les Electrons dans les M{\'e}taux. Dixi{\`e}me
                 Conference Solvay, Bruxelles 1954",
  title =        "An Extension of the {Hartree-Fock} Method to Include
                 Correlation Effects",
  publisher =    "????",
  address =      "????",
  pages =        "71--88",
  year =         "1955",
  LCCN =         "????",
  bibdate =      "Fri Nov 17 08:25:54 2000",
  bibsource =    "http://falcon.kvac.uu.se/swe/personal/PerOlovLowdinPub.html",
  acknowledgement = ack-nhfb,
}

@Article{Lowdin:1955:LEN,
  author =       "Per-Olov L{\"o}wdin and H. Shull",
  title =        "Letter to the Editor: Natural Spin-Orbitals for
                 Helium",
  journal =      j-J-CHEM-PHYS,
  volume =       "23",
  number =       "8",
  pages =        "1565--1565",
  month =        aug,
  year =         "1955",
  CODEN =        "JCPSA6",
  ISSN =         "0021-9606",
  bibdate =      "Fri Dec 15 18:36:03 2000",
  bibsource =    "http://falcon.kvac.uu.se/swe/personal/PerOlovLowdinPub.html",
  acknowledgement = ack-nhfb,
}

@Article{Lowdin:1955:QTMa,
  author =       "Per-Olov L{\"o}wdin",
  title =        "Quantum theory of many-particle systems. {I}.
                 {Physical} interpretations by means of density
                 matrices, natural spin-orbitals, and convergence
                 problems in the method of configurational interaction",
  journal =      j-PHYS-REV,
  volume =       "97",
  number =       "6",
  pages =        "1474--1489",
  day =          "15",
  month =        mar,
  year =         "1955",
  CODEN =        "PHRVAO",
  ISSN =         "0031-899X",
  MRclass =      "81.0X",
  MRnumber =     "16,983e",
  MRreviewer =   "L. Van Hove",
  bibdate =      "Tue Dec 26 12:07:48 2000",
  bibsource =    "http://falcon.kvac.uu.se/swe/personal/PerOlovLowdinPub.html;
                 MathSciNet database; nhfb-allref.bib; Zentralblatt Math
                 database",
  acknowledgement = ack-nhfb,
  annote =       "See historical perspective \cite{Roos:2000:PQT}.",
  keywords =     "natural spin-orbitals (NSO); structure of matter",
  ZMnumber =     "065.44907",
}

@Article{Lowdin:1955:QTMb,
  author =       "Per-Olov L{\"o}wdin",
  title =        "Quantum theory of many-particle systems. {II}. {Study}
                 of the ordinary {Hartree-Fock} approximation",
  journal =      j-PHYS-REV,
  volume =       "97",
  number =       "6",
  pages =        "1490--1508",
  day =          "15",
  month =        mar,
  year =         "1955",
  CODEN =        "PHRVAO",
  ISSN =         "0031-899X",
  MRclass =      "81.0X",
  MRnumber =     "16,983f",
  MRreviewer =   "L. Van Hove",
  bibdate =      "Tue Dec 26 12:07:47 2000",
  bibsource =    "http://falcon.kvac.uu.se/swe/personal/PerOlovLowdinPub.html;
                 MathSciNet database; nhfb-allref.bib; Zentralblatt Math
                 database",
  acknowledgement = ack-nhfb,
  annote =       "See historical perspective \cite{Roos:2000:PQT}.",
  keywords =     "structure of matter",
  ZMnumber =     "065.44907",
}

@Article{Lowdin:1955:QTMc,
  author =       "Per-Olov L{\"o}wdin",
  title =        "Quantum theory of many-particle systems. {III}.
                 {Extension} of the {Hartree-Fock} scheme to include
                 degenerate systems and correlation effects",
  journal =      j-PHYS-REV,
  volume =       "97",
  number =       "6",
  pages =        "1509--1520",
  day =          "15",
  month =        mar,
  year =         "1955",
  CODEN =        "PHRVAO",
  ISSN =         "0031-899X",
  MRclass =      "81.0X",
  MRnumber =     "16,983g",
  MRreviewer =   "L. Van Hove",
  bibdate =      "Tue Dec 26 12:07:45 2000",
  bibsource =    "http://falcon.kvac.uu.se/swe/personal/PerOlovLowdinPub.html;
                 MathSciNet database; nhfb-allref.bib; Zentralblatt Math
                 database",
  acknowledgement = ack-nhfb,
  annote =       "See historical perspective \cite{Roos:2000:PQT}.",
  keywords =     "structure of matter",
  ZMnumber =     "065.44907",
}

@Article{Lowdin:1955:RSQ,
  author =       "Per-Olov L{\"o}wdin and I. Fischer-Hjalmars",
  title =        "Report from the {Symposium on Quantum Theory of
                 Molecules, Stockholm and Uppsala, 1955}",
  journal =      j-SVENSK-KEMISK-TIDSKRIFT,
  volume =       "67",
  number =       "??",
  pages =        "365--398",
  year =         "1955",
  ISSN =         "0039-6605",
  bibdate =      "Fri Nov 17 08:26:49 2000",
  bibsource =    "http://falcon.kvac.uu.se/swe/personal/PerOlovLowdinPub.html",
  note =         "See especially pp. 369, 370, 373, 375, 379, 380 and
                 383.",
  acknowledgement = ack-nhfb,
  journalabr =   "Sv. Kem. Tidskrift",
  xxnote =       "Check author order??",
}

@Article{Shull:1955:LER,
  author =       "Harrison Shull and Per-Olov L{\"o}wdin",
  title =        "Letter to the Editor: Role of the Continuum in
                 Superposition of Configurations",
  journal =      j-J-CHEM-PHYS,
  volume =       "23",
  number =       "7",
  pages =        "1362--1362",
  month =        jul,
  year =         "1955",
  CODEN =        "JCPSA6",
  ISSN =         "0021-9606",
  bibdate =      "Mon Dec 18 10:40:43 2000",
  bibsource =    "http://falcon.kvac.uu.se/swe/personal/PerOlovLowdinPub.html",
  acknowledgement = ack-nhfb,
}

@Article{Lowdin:1956:ECT,
  author =       "Per-Olov L{\"o}wdin",
  title =        "Electronic Correlation in the Theory of Molecular
                 Energy Levels",
  journal =      j-TEX-J-SCI,
  volume =       "8",
  pages =        "163--??",
  year =         "1956",
  CODEN =        "TJSCAU",
  ISSN =         "0040-4403",
  bibdate =      "Tue Dec 05 09:11:08 2000",
  bibsource =    "http://falcon.kvac.uu.se/swe/personal/PerOlovLowdinPub.html",
  note =         "Proceedings of the Molecular Quantum Mechanics
                 Conference, December 7--9, 1955, Texas, p. 30.",
  acknowledgement = ack-nhfb,
}

@Article{Lowdin:1956:NOQ,
  author =       "Per-Olov L{\"o}wdin and Harrison Shull",
  title =        "Natural Orbitals in the Quantum Theory of Two-Electron
                 Systems",
  journal =      j-PHYS-REV,
  volume =       "101",
  number =       "6",
  pages =        "1730--1739",
  day =          "15",
  month =        mar,
  year =         "1956",
  CODEN =        "PHRVAO",
  ISSN =         "0031-899X",
  bibdate =      "Fri Dec 15 19:18:24 2000",
  bibsource =    "http://falcon.kvac.uu.se/swe/personal/PerOlovLowdinPub.html;
                 nhfb-allref.bib; Zentralblatt Math database",
  acknowledgement = ack-nhfb,
  keywords =     "density matrix; NSO; structure of matter",
  ZMnumber =     "070.23502",
}

@Article{Lowdin:1956:QTC,
  author =       "Per-Olov L{\"o}wdin",
  title =        "Quantum theory of cohesive properties of solids",
  journal =      j-ADV-PHYS,
  volume =       "5",
  number =       "17",
  pages =        "1--172",
  month =        jan,
  year =         "1956",
  CODEN =        "ADPHAH",
  ISSN =         "0001-8732",
  MRclass =      "81.0X",
  MRnumber =     "17,1035d",
  MRreviewer =   "C. Herring",
  bibdate =      "Mon Dec 18 10:30:37 2000",
  bibsource =    "http://falcon.kvac.uu.se/swe/personal/PerOlovLowdinPub.html;
                 MathSciNet database; Zentralblatt Math database",
  acknowledgement = ack-nhfb,
  keywords =     "rigid bodies",
  ZMnumber =     "073.23803",
  ZMreviewer =   "G. Hoehler",
}

@Article{Lowdin:1956:SSC,
  author =       "Per-Olov L{\"o}wdin and K. Appel",
  title =        "Studies of Self-Consistent Fields. {III.} Analytic
                 Wave Functions for the Argon-Like Ions and for the
                 First Row of the Transition Metals",
  journal =      j-PHYS-REV,
  volume =       "103",
  number =       "6",
  pages =        "1746--1755",
  day =          "15",
  month =        sep,
  year =         "1956",
  CODEN =        "PHRVAO",
  ISSN =         "0031-899X",
  bibdate =      "Mon Dec 18 10:58:46 2000",
  bibsource =    "http://falcon.kvac.uu.se/swe/personal/PerOlovLowdinPub.html",
  acknowledgement = ack-nhfb,
}

@Article{Shull:1956:CSH,
  author =       "Harrison Shull and Per-Olov L{\"o}wdin",
  title =        "Correlation Splitting in Helium-Like Ions",
  journal =      j-J-CHEM-PHYS,
  volume =       "25",
  number =       "5",
  pages =        "1035--1040",
  month =        nov,
  year =         "1956",
  CODEN =        "JCPSA6",
  ISSN =         "0021-9606",
  bibdate =      "Mon Dec 18 10:56:37 2000",
  bibsource =    "http://falcon.kvac.uu.se/swe/personal/PerOlovLowdinPub.html;
                 nhfb-allref.bib",
  acknowledgement = ack-nhfb,
}

@TechReport{Fieschi:1957:ASW,
  author =       "R. Fieschi and P.-O. L{\"o}wdin",
  title =        "Atomic State Wavefunctions Generated by Projection
                 Operators",
  type =         "Technical Report",
  number =       "TU-4",
  institution =  inst-KKUU,
  address =      inst-KKUU:adr,
  pages =        "??",
  year =         "1957",
  bibdate =      "Thu Nov 16 12:07:42 2000",
  bibsource =    "nhfb-allref.bib",
  acknowledgement = ack-nhfb,
}

@Article{Lowdin:1957:PSQ,
  author =       "Per-Olov L{\"o}wdin",
  title =        "Present Situation of Quantum Chemistry",
  journal =      j-J-PHYS-CHEM,
  volume =       "61",
  number =       "1",
  pages =        "55--68",
  day =          "30",
  month =        jan,
  year =         "1957",
  CODEN =        "JPCHAX",
  ISSN =         "0022-3654",
  bibdate =      "Mon Dec 18 10:46:10 2000",
  bibsource =    "http://falcon.kvac.uu.se/swe/personal/PerOlovLowdinPub.html",
  acknowledgement = ack-nhfb,
}

@Article{Freeman:1958:QMK,
  author =       "A. J. Freeman and Per-Olov L{\"o}wdin",
  title =        "Quantum Mechanical Kinetic Energy Transformation",
  journal =      j-PHYS-REV,
  volume =       "111",
  number =       "5",
  pages =        "1212--1213",
  day =          "1",
  month =        sep,
  year =         "1958",
  CODEN =        "PHRVAO",
  ISSN =         "0031-899X",
  bibdate =      "Mon Dec 18 10:59:11 2000",
  bibsource =    "http://falcon.kvac.uu.se/swe/personal/PerOlovLowdinPub.html",
  acknowledgement = ack-nhfb,
}

@TechReport{Lowdin:1958:CFO,
  author =       "Per-Olov L{\"o}wdin",
  title =        "Calcul des Fonctions d'Onde Mol{\'e}culaire",
  type =         "Technical Report",
  institution =  "Centre National de la Recherche Scientifique",
  address =      "Paris, France",
  pages =        "23",
  year =         "1958",
  bibdate =      "Tue Dec 26 12:34:19 2000",
  acknowledgement = ack-nhfb,
  annote =       "Cited in Britt Friis-Jensen, Sten Rettrup, and C. R.
                 Sarma, ``Indexing Scheme for Classes of {${\cal S}_N$};
                 Partitions of {$N$}'', Int. J. Quant. Chem. {\bf
                 64}(4), 421--426, September 5 (1997).",
  xxnote =       "Check pages?? Was this really a technical report??",
}

@Article{Lowdin:1958:GHF,
  author =       "Per-Olov L{\"o}wdin",
  title =        "Generalizations of the {Hartree-Fock} scheme",
  journal =      "Annales Academiae regiae scientiarum upsaliensis",
  volume =       "2",
  number =       "??",
  pages =        "127--135",
  year =         "1958",
  CODEN =        "????",
  ISSN =         "????",
  MRclass =      "81.00",
  MRnumber =     "22 #1375",
  MRreviewer =   "A. C. Hurley",
  bibdate =      "Thu Nov 16 11:51:44 MST 2000",
  bibsource =    "http://falcon.kvac.uu.se/swe/personal/PerOlovLowdinPub.html;
                 MathSciNet database",
  acknowledgement = ack-nhfb,
  journalabr =   "Ann. Acad. Reg. Sci. Upsal.",
}

@Article{Lowdin:1958:KKB,
  author =       "Per-Olov L{\"o}wdin",
  title =        "Den Kovalenta Kemiska Bindningen i Kvantmekanisk
                 Belysning. ({Swedish}) [The Covalent Chemical Bond in a
                 Quantum-Mechanical Light]",
  journal =      j-ELEMENTA-TMFK,
  volume =       "40",
  number =       "??",
  pages =        "1--16",
  year =         "1958",
  CODEN =        "EMNTAE",
  ISSN =         "0013-5933",
  bibdate =      "Fri Nov 17 08:36:30 2000",
  bibsource =    "http://falcon.kvac.uu.se/swe/personal/PerOlovLowdinPub.html",
  acknowledgement = ack-nhfb,
  language =     "Swedish",
}

@InProceedings{Lowdin:1958:NFM,
  author =       "P.-O. L{\"o}wdin",
  booktitle =    "Proc. Paris Symposium",
  title =        "Nature des Fonctions de la {M}{\'e}somerie. ({French})
                 [{Nature} of Mesomeric Functions]",
  volume =       "LXXXII",
  publisher =    "Centre National de la Recherche Scientifique",
  address =      "Paris, France",
  pages =        "23--27",
  year =         "1958",
  bibdate =      "Tue Dec 26 12:35:41 2000",
  bibsource =    "http://falcon.kvac.uu.se/swe/personal/PerOlovLowdinPub.html;
                 nhfb-allref.bib",
  acknowledgement = ack-nhfb,
  language =     "French",
  xxnote =       "Check year: 1957 or 1958?? Was this a conference
                 paper, or a technical report??",
}

@Article{Lowdin:1958:SDP,
  author =       "Per-Olov L{\"o}wdin",
  title =        "Spin Degeneracy Problem",
  journal =      "Coll. Int. Centre Nat. Rech. Sci. Paris",
  volume =       "82",
  number =       "??",
  pages =        "23--??",
  year =         "1958",
  bibdate =      "Fri Nov 17 08:37:27 2000",
  bibsource =    "http://falcon.kvac.uu.se/swe/personal/PerOlovLowdinPub.html",
  acknowledgement = ack-nhfb,
  xxnote =       "What is full name of this journal?? Is it ``Colloques
                 internationaux du Centre national de la recherche
                 scientifique. Sciences humaines''??",
}

@TechReport{Lowdin:1958:Xa,
  author =       "Per-Olov L{\"o}wdin",
  title =        "xxx",
  type =         "Technical report",
  institution =  inst-KKUU,
  address =      inst-KKUU:adr,
  day =          "23",
  month =        apr,
  year =         "1958",
  bibdate =      "Fri Dec 15 19:19:38 2000",
  acknowledgement = ack-nhfb,
  annote =       "Cited in \cite{Lowdin:1959:CUM}.",
}

@TechReport{Lowdin:1958:Xb,
  author =       "Per-Olov L{\"o}wdin",
  title =        "xxx",
  type =         "Technical report",
  institution =  inst-KKUU,
  address =      inst-KKUU:adr,
  day =          "15",
  month =        jun,
  year =         "1958",
  bibdate =      "Fri Dec 15 19:19:38 2000",
  acknowledgement = ack-nhfb,
  annote =       "Cited in \cite{Lowdin:1959:CUM}.",
}

@Article{Shull:1958:LEV,
  author =       "Harrison Shull and Per-Olov L{\"o}wdin",
  title =        "Letter to the Editor: Variation theorem for excited
                 states",
  journal =      j-PHYS-REV-2,
  volume =       "110",
  number =       "6",
  pages =        "1466--1467",
  day =          "15",
  month =        jun,
  year =         "1958",
  bibdate =      "Mon Dec 18 10:59:17 2000",
  bibsource =    "http://falcon.kvac.uu.se/swe/personal/PerOlovLowdinPub.html;
                 Zentralblatt Math database",
  acknowledgement = ack-nhfb,
  keywords =     "mechanics of particles and systems",
  ZMnumber =     "092.22705",
}

@Article{Hirschfelder:1959:LRI,
  author =       "J. O. Hirschfelder and P.-O. L{\"o}wdin",
  title =        "Long-range interaction of two $1s$-hydrogen atoms
                 expressed in terms of natural spin-orbitals",
  journal =      j-MOL-PHYS,
  volume =       "2",
  number =       "3",
  pages =        "229--258",
  month =        jul,
  year =         "1959",
  CODEN =        "MOPHAM",
  ISSN =         "0026-8976",
  bibdate =      "Mon Dec 18 10:47:06 2000",
  bibsource =    "http://falcon.kvac.uu.se/swe/personal/PerOlovLowdinPub.html;
                 Zentralblatt Math database",
  acknowledgement = ack-nhfb,
  journalabr =   "Molecular Phys.",
  keywords =     "structure of matter",
  ZMnumber =     "088.23206",
}

@Article{Lowdin:1959:CPM,
  author =       "Per-Olov L{\"o}wdin",
  title =        "Correlation Problem in Many-Electron Quantum
                 Mechanics. {I}. {Review} of Different Approaches and
                 Discussion of Some Current Ideas",
  journal =      j-ADV-CHEM-PHYS,
  volume =       "2",
  pages =        "207--322",
  year =         "1959",
  CODEN =        "ADCPAA",
  ISSN =         "0065-2385",
  MRclass =      "81.00",
  MRnumber =     "21 #5453",
  MRreviewer =   "A. C. Hurley",
  bibdate =      "Fri Dec 15 17:33:14 2000",
  bibsource =    "http://falcon.kvac.uu.se/swe/personal/PerOlovLowdinPub.html;
                 MathSciNet database; nhfb-allref.bib",
  acknowledgement = ack-nhfb,
  annote =       "Annual book series: no issue numbers.",
  journalabr =   "Adv. Chem. Phys.",
}

@Article{Lowdin:1959:CUM,
  author =       "Per-Olov L{\"o}wdin and Lajos R{\`e}dei",
  title =        "Combined use of the methods of superposition of
                 configurations and correlation factor on the ground
                 states of the helium-like atoms",
  journal =      j-PHYS-REV,
  volume =       "114",
  number =       "3",
  pages =        "752--757",
  day =          "1",
  month =        may,
  year =         "1959",
  CODEN =        "PHRVAO",
  ISSN =         "0031-899X",
  MRclass =      "81.00",
  MRnumber =     "21 #5455",
  MRreviewer =   "D. F. Mayers",
  bibdate =      "Mon Dec 18 10:59:33 2000",
  bibsource =    "http://falcon.kvac.uu.se/swe/personal/PerOlovLowdinPub.html;
                 MathSciNet database; Zentralblatt Math database",
  acknowledgement = ack-nhfb,
  keywords =     "structure of matter",
  ZMnumber =     "088.44803",
}

@InProceedings{Lowdin:1959:IVA,
  author =       "Per-Olov L{\"o}wdin",
  booktitle =    "Nord-SAM, Karlskrona and Lund, Sweden",
  title =        "En Iterations-Variationsmetod for att {L}{\"o}sa
                 Egenvardesproblem. ({Swedish}) [An Iteration-Variation
                 Method for Solving the Eigenvalue Problem]",
  type =         "Technical Report",
  publisher =    "????",
  address =      "????",
  pages =        "199--209",
  year =         "1959",
  bibdate =      "Fri Nov 17 08:45:07 2000",
  bibsource =    "http://falcon.kvac.uu.se/swe/personal/PerOlovLowdinPub.html",
  acknowledgement = ack-nhfb,
  language =     "Swedish",
}

@Article{Lowdin:1959:SPV,
  author =       "P.-O. L{\"o}wdin",
  title =        "Scaling Problem, Virial Theorem, and Connected
                 Relations in Quantum Mechanics",
  journal =      j-J-MOL-SPECTROSC,
  volume =       "3",
  number =       "1",
  pages =        "46--66",
  month =        feb,
  year =         "1959",
  CODEN =        "JMOSA3",
  ISSN =         "0022-2852",
  bibdate =      "Fri Dec 15 18:52:42 2000",
  bibsource =    "http://falcon.kvac.uu.se/swe/personal/PerOlovLowdinPub.html;
                 nhfb-allref.bib",
  acknowledgement = ack-nhfb,
  journalabr =   "J. Mol. Spect.",
}

@Article{Shull:1959:SCN,
  author =       "Harrison Shull and Per-Olov L{\"o}wdin",
  title =        "Superposition of Configurations and Natural Spin
                 Orbitals. {Applications} to the {He} Problem",
  journal =      j-J-CHEM-PHYS,
  volume =       "30",
  number =       "3",
  pages =        "617--626",
  month =        mar,
  year =         "1959",
  CODEN =        "JCPSA6",
  ISSN =         "0021-9606",
  bibdate =      "Fri Dec 15 18:36:43 2000",
  bibsource =    "http://falcon.kvac.uu.se/swe/personal/PerOlovLowdinPub.html",
  acknowledgement = ack-nhfb,
}

@Article{Lowdin:1960:CIO,
  author =       "P.-O. L{\"o}wdin and R. Pauncz and J. de Heer",
  title =        "On the calculation of the inverse of the overlap
                 matrix in cyclic systems",
  journal =      j-J-MATH-PHYS,
  volume =       "1",
  pages =        "461--467",
  year =         "1960",
  CODEN =        "JMAPAQ",
  ISSN =         "0022-2488",
  bibdate =      "Fri Nov 17 07:07:31 2000",
  bibsource =    "http://falcon.kvac.uu.se/swe/personal/PerOlovLowdinPub.html;
                 Zentralblatt Math database",
  acknowledgement = ack-nhfb,
  keywords =     "numerical analysis",
  ZMnumber =     "098.09301",
}

@Article{Lowdin:1960:ETT,
  author =       "Per-Olov L{\"o}wdin",
  title =        "Expansion theorems for the total wave function and
                 extended {Hartree-Fock} schemes",
  journal =      j-REV-MOD-PHYS,
  volume =       "32",
  number =       "2",
  pages =        "328--334",
  month =        apr,
  year =         "1960",
  CODEN =        "RMPHAT",
  ISSN =         "0034-6861",
  MRclass =      "81.00",
  MRnumber =     "22 #3509",
  MRreviewer =   "A. C. Hurley",
  bibdate =      "Fri Dec 15 19:28:49 2000",
  bibsource =    "http://falcon.kvac.uu.se/swe/personal/PerOlovLowdinPub.html;
                 MathSciNet database; nhfb-allref.bib; Zentralblatt Math
                 database",
  acknowledgement = ack-nhfb,
  keywords =     "structure of matter",
  ZMnumber =     "091.23704",
}

@Article{Lowdin:1960:QTE,
  author =       "Per-Olov L{\"o}wdin",
  title =        "Quantum Theory of Electronic Structure of Molecules",
  journal =      j-ANN-REV-PHYS-CHEM,
  volume =       "11",
  pages =        "107--132",
  year =         "1960",
  CODEN =        "ARPLAP",
  ISSN =         "0066-426X",
  bibdate =      "Fri Nov 17 08:47:03 2000",
  bibsource =    "http://falcon.kvac.uu.se/swe/personal/PerOlovLowdinPub.html",
  acknowledgement = ack-nhfb,
}

@InProceedings{Lowdin:1960:SAR,
  author =       "P.-O. L{\"o}wdin",
  booktitle =    "Proceedings of the Robert A. Welch Foundation
                 Conferences on Chemical Research. {II}. {Atomic}
                 Structure",
  title =        "Some Aspects of the Recent Development of the Theory
                 of the Electronic Structure of Atoms",
  publisher =    "Robert A. Welch Foundation",
  address =      "Houston, TX, USA",
  pages =        "5--75",
  year =         "1960",
  CODEN =        "PRAWAC",
  ISSN =         "0557-1588",
  bibdate =      "Tue Dec 05 09:15:21 2000",
  bibsource =    "nhfb-allref.bib",
  acknowledgement = ack-nhfb,
  xxnote =       "Check year: 1958 or 1960??",
}

@Article{Lowdin:1961:NST,
  author =       "Per-Olov L{\"o}wdin",
  title =        "Note on the separability theorem for electron pairs",
  journal =      j-J-CHEM-PHYS,
  volume =       "35",
  number =       "1",
  pages =        "78--81",
  month =        jul,
  year =         "1961",
  CODEN =        "JCPSA6",
  ISSN =         "0021-9606",
  MRclass =      "81.46",
  MRnumber =     "23 #B907",
  MRreviewer =   "A. C. Hurley",
  bibdate =      "Thu Nov 16 11:51:44 MST 2000",
  bibsource =    "http://falcon.kvac.uu.se/swe/personal/PerOlovLowdinPub.html;
                 MathSciNet database",
  acknowledgement = ack-nhfb,
}

@Article{Lowdin:1961:PCC,
  author =       "Per-Olov L{\"o}wdin",
  title =        "The Principle of Causality, the Chemical Bond and
                 Modern Quantum Chemistry",
  journal =      "Annales Academiae regiae scientiarum upsaliensis",
  volume =       "5",
  number =       "??",
  pages =        "63--78",
  year =         "1961",
  bibdate =      "Fri Nov 17 08:47:53 2000",
  bibsource =    "http://falcon.kvac.uu.se/swe/personal/PerOlovLowdinPub.html",
  acknowledgement = ack-nhfb,
  journalabr =   "Ann. Acad. Reg. Sci. Upsaliensis",
  xxCODEN =      "none",
  xxISSN =       "none",
}

@Article{Calais:1962:SMT,
  author =       "Jean-Louis Calais and Per-Olov L{\"o}wdin",
  title =        "A Simple Method of Treating Atomic Integrals
                 Containing Functions of $r_{12}$",
  journal =      j-J-MOL-SPECTROSC,
  volume =       "8",
  number =       "3",
  pages =        "203--211",
  month =        mar,
  year =         "1962",
  CODEN =        "JMOSA3",
  ISSN =         "0022-2852",
  bibdate =      "Thu Nov 16 12:07:42 2000",
  bibsource =    "http://falcon.kvac.uu.se/swe/personal/PerOlovLowdinPub.html;
                 nhfb-allref.bib",
  acknowledgement = ack-nhfb,
  journalabr =   "J. Mol. Spect.",
}

@Unpublished{Lowdin:1962:CSM,
  author =       "Per-Olov L{\"o}wdin",
  title =        "Is Cancer a Sub-Molecular Disease Caused by ``Proton
                 Exchange''?",
  day =          "1",
  month =        jun,
  year =         "1962",
  bibdate =      "Fri Dec 22 12:50:57 2000",
  note =         "Unpublished manuscript.",
  acknowledgement = ack-nhfb,
}

@Article{Lowdin:1962:ECS,
  author =       "Per-Olov L{\"o}wdin",
  title =        "Exchange, correlation, and spin effects in molecular
                 and solid-state theory",
  journal =      j-REV-MOD-PHYS,
  volume =       "34",
  number =       "1",
  pages =        "80--87",
  month =        jan,
  year =         "1962",
  CODEN =        "RMPHAT",
  ISSN =         "0034-6861",
  MRclass =      "82.99",
  MRnumber =     "25 #1901",
  MRreviewer =   "A. C. Hurley",
  bibdate =      "Thu Nov 16 11:51:44 MST 2000",
  bibsource =    "http://falcon.kvac.uu.se/swe/personal/PerOlovLowdinPub.html;
                 MathSciNet database",
  acknowledgement = ack-nhfb,
}

@Unpublished{Lowdin:1962:EIV,
  author =       "Per-Olov L{\"o}wdin",
  title =        "An Elementary Iteration-Variation Procedure for
                 Solving the {Schr{\"o}dinger} Equation",
  year =         "1962",
  bibdate =      "Fri Dec 22 12:50:57 2000",
  note =         "Unpublished manuscript.",
  acknowledgement = ack-nhfb,
}

@Article{Lowdin:1962:NCM,
  author =       "Per-Olov L{\"o}wdin",
  title =        "The Normal Constants of Motion in Quantum Mechanics
                 Treated by Projection Technique",
  journal =      j-REV-MOD-PHYS,
  volume =       "34",
  number =       "3",
  pages =        "520--530",
  month =        jul,
  year =         "1962",
  CODEN =        "RMPHAT",
  ISSN =         "0034-6861",
  MRclass =      "81.47",
  MRnumber =     "25 #4784",
  MRreviewer =   "E. L. Hill",
  bibdate =      "Thu Nov 16 11:51:44 MST 2000",
  bibsource =    "http://falcon.kvac.uu.se/swe/personal/PerOlovLowdinPub.html;
                 MathSciNet database; nhfb-allref.bib; Zentralblatt Math
                 database",
  acknowledgement = ack-nhfb,
  keywords =     "quantum theory",
  ZMnumber =     "105.21603",
}

@TechReport{Lowdin:1962:QGA,
  author =       "Per-Olov L{\"o}wdin",
  title =        "Quantum Genetics and the Aperiodic Solid",
  type =         "Technical report",
  number =       "TN 85",
  institution =  inst-KKUU,
  address =      inst-KKUU:adr,
  day =          "11",
  month =        nov,
  year =         "1962",
  bibdate =      "Fri Dec 22 12:54:21 2000",
  acknowledgement = ack-nhfb,
}

@Unpublished{Lowdin:1962:QTM,
  author =       "Per-Olov L{\"o}wdin",
  title =        "Quantum Theory of Molecules of Importance in Cancer
                 Research",
  day =          "1",
  month =        jun,
  year =         "1962",
  bibdate =      "Fri Dec 22 12:50:57 2000",
  note =         "Unpublished manuscript.",
  acknowledgement = ack-nhfb,
}

@Article{Lowdin:1962:QTN,
  author =       "P.-O. L{\"o}wdin",
  title =        "Quantum Theory of Nonmetallic Crystals. {Band} Theory,
                 Valence Bond, and Tight-Binding Calculations",
  journal =      j-J-APPL-PHYS,
  volume =       "33",
  number =       "1",
  pages =        "251--280",
  month =        jan,
  year =         "1962",
  CODEN =        "JAPIAU",
  ISSN =         "0021-8979, 1089-7550",
  bibdate =      "Fri Dec 15 19:38:45 2000",
  bibsource =    "http://falcon.kvac.uu.se/swe/personal/PerOlovLowdinPub.html;
                 nhfb-allref.bib",
  acknowledgement = ack-nhfb,
  journalabr-1 = "J. Applied Phys.",
  journalabr-2 = "J. appl. physi.",
  keywords =     "mechanics of particles and systems",
  ZMnumber =     "099.44803",
}

@Article{Lowdin:1962:SPTa,
  author =       "Per-Olov L{\"o}wdin",
  title =        "Studies in Perturbation Theory. {IV}. {Solution} of
                 Eigenvalue Problem by Projection Operator Formalism",
  journal =      j-J-MATH-PHYS,
  volume =       "3",
  number =       "5",
  pages =        "969--982",
  month =        sep # "\slash " # oct,
  year =         "1962",
  CODEN =        "JMAPAQ",
  ISSN =         "0022-2488",
  MRclass =      "81.41",
  MRnumber =     "26 #4714",
  MRreviewer =   "A. C. Hurley",
  bibdate =      "Mon Dec 18 10:41:06 2000",
  bibsource =    "http://falcon.kvac.uu.se/swe/personal/PerOlovLowdinPub.html;
                 MathSciNet database; nhfb-allref.bib; Zentralblatt Math
                 database",
  acknowledgement = ack-nhfb,
  keywords =     "mechanics of particles and systems",
  ZMnumber =     "109.22801",
}

@Article{Lowdin:1962:SPTb,
  author =       "Per-Olov L{\"o}wdin",
  title =        "Studies in Perturbation Theory. {V}. {Some} Aspects on
                 the Exact Self-Consistent Field Theory",
  journal =      j-J-MATH-PHYS,
  volume =       "3",
  number =       "6",
  pages =        "1171--1184",
  month =        nov # "\slash " # dec,
  year =         "1962",
  CODEN =        "JMAPAQ",
  ISSN =         "0022-2488",
  MRclass =      "81.41",
  MRnumber =     "26 #4686",
  MRreviewer =   "A. C. Hurley",
  bibdate =      "Mon Dec 18 10:41:35 2000",
  bibsource =    "http://falcon.kvac.uu.se/swe/personal/PerOlovLowdinPub.html;
                 MathSciNet database; nhfb-allref.bib; Zentralblatt Math
                 database",
  acknowledgement = ack-nhfb,
  keywords =     "quantum theory",
  ZMnumber =     "129.42707",
}

@TechReport{Lowdin:1962:SRP,
  author =       "Per-Olov L{\"o}wdin",
  title =        "Some Recent Progress in the Quantum Theory of
                 Many-Electron Systems",
  type =         "Technical report",
  number =       "TN 83",
  institution =  inst-KKUU,
  address =      inst-KKUU:adr,
  day =          "15",
  month =        aug,
  year =         "1962",
  bibdate =      "Fri Dec 22 12:54:21 2000",
  acknowledgement = ack-nhfb,
}

@Article{Lowdin:1962:VTC,
  author =       "A. Fr{\"o}man and Per-Olov L{\"o}wdin",
  title =        "Virial Theorem and Cohesive Energies of Solids,
                 Particularly Ionic Crystals",
  journal =      j-J-PHYS-CHEM-SOLIDS,
  volume =       "23",
  pages =        "75--84",
  year =         "1962",
  CODEN =        "JPCSAW",
  ISSN =         "0022-3697",
  bibdate =      "Fri Dec 15 19:17:06 2000",
  bibsource =    "http://falcon.kvac.uu.se/swe/personal/PerOlovLowdinPub.html",
  acknowledgement = ack-nhfb,
  annote =       "This journal does not have issue numbers.",
}

@Article{Pauncz:1962:SAMa,
  author =       "R. Pauncz and J. de Heer and P.-O. L{\"o}wdin",
  title =        "Studies on the Alternant Molecular Orbital Method.
                 {I}. {General} Energy Expression for an Alternant
                 System with Closed-Shell Structure",
  journal =      j-J-CHEM-PHYS,
  volume =       "36",
  number =       "9",
  pages =        "2247--2256",
  day =          "1",
  month =        may,
  year =         "1962",
  CODEN =        "JCPSA6",
  ISSN =         "0021-9606",
  bibdate =      "Fri Dec 15 18:44:21 2000",
  bibsource =    "http://falcon.kvac.uu.se/swe/personal/PerOlovLowdinPub.html",
  acknowledgement = ack-nhfb,
}

@Article{Pauncz:1962:SAMb,
  author =       "R. Pauncz and J. de Heer and P.-O. L{\"o}wdin",
  title =        "Studies on the Alternant Molecular Orbital Method.
                 {II}. {Application} to Cyclic Systems",
  journal =      j-J-CHEM-PHYS,
  volume =       "36",
  number =       "9",
  pages =        "2257--2265",
  day =          "1",
  month =        may,
  year =         "1962",
  CODEN =        "JCPSA6",
  ISSN =         "0021-9606",
  bibdate =      "Fri Dec 15 18:45:06 2000",
  bibsource =    "http://falcon.kvac.uu.se/swe/personal/PerOlovLowdinPub.html",
  acknowledgement = ack-nhfb,
}

@Article{Coleman:1963:DSF,
  author =       "A. J. Coleman and P.-O. L{\"o}wdin and Darwin W.
                 Smith",
  title =        "Discussion on {``Structure of Fermion Density
                 Matrices''}",
  journal =      j-REV-MOD-PHYS,
  volume =       "35",
  number =       "3",
  pages =        "687--689",
  month =        jul,
  year =         "1963",
  CODEN =        "RMPHAT",
  ISSN =         "0034-6861",
  bibdate =      "Tue Dec 26 12:20:10 2000",
  acknowledgement = ack-nhfb,
}

@Article{Harris:1963:DNE,
  author =       "F. Harris and R. Nesbet and P.-O. L{\"o}wdin and E. R.
                 Davidson",
  title =        "Discussion on {``Natural Expansions and Properties of
                 the Chemical Bond''}",
  journal =      j-REV-MOD-PHYS,
  volume =       "35",
  number =       "3",
  pages =        "629--630",
  month =        jul,
  year =         "1963",
  CODEN =        "RMPHAT",
  ISSN =         "0034-6861",
  bibdate =      "Tue Dec 26 12:20:10 2000",
  acknowledgement = ack-nhfb,
}

@Article{Lowdin:1963:ISAb,
  author =       "Per-Olov L{\"o}wdin",
  title =        "{International Symposium on Atomic and Molecular
                 Quantum Mechanics: Proceedings in Honor of Professor
                 Egil A. Hylleraas and arranged by the University of
                 Florida at Sanibel Island, 14--19 January 1963}:
                 Introduction",
  journal =      j-REV-MOD-PHYS,
  volume =       "35",
  number =       "3",
  pages =        "415--415",
  month =        jul,
  year =         "1963",
  CODEN =        "RMPHAT",
  ISSN =         "0034-6861",
  bibdate =      "Fri Dec 15 19:33:22 2000",
  acknowledgement = ack-nhfb,
}

@Article{Lowdin:1963:PTD,
  author =       "Per-Olov L{\"o}wdin",
  title =        "Proton Tunneling in {DNA} and its Biological
                 Implications",
  journal =      j-REV-MOD-PHYS,
  volume =       "35",
  number =       "3",
  pages =        "724--732",
  month =        jul,
  year =         "1963",
  CODEN =        "RMPHAT",
  ISSN =         "0034-6861",
  bibdate =      "Fri Dec 15 19:34:11 2000",
  bibsource =    "http://falcon.kvac.uu.se/swe/personal/PerOlovLowdinPub.html",
  acknowledgement = ack-nhfb,
}

@Article{Lowdin:1963:QG,
  author =       "Per-Olov L{\"o}wdin",
  title =        "Quantum Genetics",
  journal =      j-INT-SCI-TECHNOL,
  volume =       "17",
  pages =        "64--68, 71--72, 74, 102",
  month =        may,
  year =         "1963",
  CODEN =        "ISCTAB",
  ISSN =         "0097-3777",
  bibdate =      "Fri Dec 15 17:32:54 2000",
  bibsource =    "http://falcon.kvac.uu.se/swe/personal/PerOlovLowdinPub.html",
  acknowledgement = ack-nhfb,
  annote =       "Volume number (== issue number) increments each
                 month.",
}

@TechReport{Lowdin:1963:QTTa,
  author =       "P.-O. L{\"o}wdin",
  title =        "Quantum Theory of Time-Dependent Phenomena Treated by
                 the Evolution Operator Technique",
  number =       "100",
  institution =  inst-KKUU,
  address =      inst-KKUU:adr,
  pages =        "????",
  month =        jun,
  year =         "1963",
  bibdate =      "Thu Nov 16 12:07:42 2000",
  bibsource =    "nhfb-allref.bib",
  note =         "Published in \cite{Lowdin:1967:QTT}.",
  acknowledgement = ack-nhfb,
}

@TechReport{Lowdin:1963:RCI,
  author =       "Per-Olov L{\"o}wdin",
  title =        "Remarks in Connection with the {International
                 Conference on Atomic and Molecular Quantum Mechanics in
                 Honour of Prof. E. A. Hylleraas on Sanibel Island}",
  type =         "Technical report",
  number =       "TN 95",
  institution =  inst-KKUU,
  address =      inst-KKUU:adr,
  day =          "13",
  month =        jan,
  year =         "1963",
  bibdate =      "Fri Dec 22 12:54:21 2000",
  acknowledgement = ack-nhfb,
}

@Unpublished{Lowdin:1963:SDH,
  author =       "P.-O. L{\"o}wdin",
  title =        "{I}. The Symmetry Dilemma in the {Hartree-Fock}
                 Scheme. {II}. Symmetry Properties of the {NSO}'s.
                 {III}. {Variation} of the Density Matrix",
  year =         "1963",
  bibdate =      "Thu Nov 16 12:07:42 2000",
  bibsource =    "nhfb-allref.bib",
  note =         "Sanibel Notes.",
  acknowledgement = ack-nhfb,
}

@Article{Lowdin:1963:SPTa,
  author =       "Per-Olov L{\"o}wdin",
  title =        "Studies in Perturbation Theory. {I}. {An} Elementary
                 Iteration-Variation Procedure For Solving the
                 {Schr{\"o}dinger} Equation by Partitioning Technique",
  journal =      j-J-MOL-SPECTROSC,
  volume =       "10",
  number =       "1",
  pages =        "12--33",
  month =        jan,
  year =         "1963",
  CODEN =        "JMOSA3",
  ISSN =         "0022-2852",
  bibdate =      "Fri Dec 15 18:53:32 2000",
  bibsource =    "http://falcon.kvac.uu.se/swe/personal/PerOlovLowdinPub.html;
                 nhfb-allref.bib",
  acknowledgement = ack-nhfb,
  journalabr =   "J. Mol. Spect.",
}

@Article{Lowdin:1963:WRO,
  author =       "Per-Olov L{\"o}wdin",
  title =        "Wave and reaction operators in the quantum theory of
                 many-particle systems",
  journal =      j-REV-MOD-PHYS,
  volume =       "35",
  number =       "3",
  pages =        "702--709",
  month =        jul,
  year =         "1963",
  CODEN =        "RMPHAT",
  ISSN =         "0034-6861",
  MRclass =      "81.47",
  MRnumber =     "31 #6610",
  MRreviewer =   "H. E. Rorschach, Jr.",
  bibdate =      "Fri Dec 15 19:33:52 2000",
  bibsource =    "http://falcon.kvac.uu.se/swe/personal/PerOlovLowdinPub.html;
                 MathSciNet database",
  acknowledgement = ack-nhfb,
}

@Article{Lykos:1963:DHF,
  author =       "P. Lykos and G. W. Pratt and P.-O. L{\"o}wdin and
                 Gilda M. Harris",
  title =        "Discussion on {``The Hartree-Fock Approximation''}",
  journal =      j-REV-MOD-PHYS,
  volume =       "35",
  number =       "3",
  pages =        "496--501",
  month =        jul,
  year =         "1963",
  CODEN =        "RMPHAT",
  ISSN =         "0034-6861",
  bibdate =      "Tue Dec 26 12:20:10 2000",
  acknowledgement = ack-nhfb,
}

@Article{Lowdin:1964:AMW,
  author =       "Per-Olov L{\"o}wdin",
  title =        "Angular Momentum Wavefunctions Constructed by
                 Projection Operators",
  journal =      j-REV-MOD-PHYS,
  volume =       "36",
  number =       "4",
  pages =        "966--976",
  month =        oct,
  year =         "1964",
  CODEN =        "RMPHAT",
  ISSN =         "0034-6861",
  MRclass =      "81.47",
  MRnumber =     "32 #8871",
  MRreviewer =   "A. C. Hurley",
  bibdate =      "Fri Dec 15 19:34:56 2000",
  bibsource =    "http://falcon.kvac.uu.se/swe/personal/PerOlovLowdinPub.html;
                 MathSciNet database; nhfb-allref.bib",
  acknowledgement = ack-nhfb,
}

@Article{Lowdin:1964:EPT,
  author =       "Per-Olov L{\"o}wdin",
  title =        "Effect of Proton Tunneling in {DNA} on Genetic
                 Information and Problems of Mutations, Aging, and
                 Tumors",
  journal =      j-BIOPOLYMERS-SYMPOSIA,
  volume =       "1",
  number =       "??",
  pages =        "161--181",
  month =        may,
  year =         "1964",
  ISSN =         "0523-6827",
  bibdate =      "Fri Nov 17 09:06:26 2000",
  bibsource =    "http://falcon.kvac.uu.se/swe/personal/PerOlovLowdinPub.html",
  acknowledgement = ack-nhfb,
}

@TechReport{Lowdin:1964:LAF,
  author =       "Per-Olov L{\"o}wdin",
  title =        "Linear Algebra and the Fundaments of Quantum Theory",
  type =         "Technical report",
  number =       "TN 125",
  institution =  inst-KKUU,
  address =      inst-KKUU:adr,
  day =          "1",
  month =        jul,
  year =         "1964",
  bibdate =      "Fri Dec 22 12:54:21 2000",
  bibsource =    "nhfb-allref.bib",
  acknowledgement = ack-nhfb,
}

@InCollection{Lowdin:1964:MOE,
  author =       "Per-Olov L{\"o}wdin",
  title =        "Molecular Orbitals in the Exact {SCF} Theory",
  crossref =     "Lowdin:1964:MOC",
  pages =        "37--55",
  year =         "1964",
  bibdate =      "Fri Nov 17 09:15:14 2000",
  bibsource =    "http://falcon.kvac.uu.se/swe/personal/PerOlovLowdinPub.html",
  acknowledgement = ack-nhfb,
}

@Article{Lowdin:1964:P,
  author =       "Per-Olov L{\"o}wdin",
  title =        "Preface",
  journal =      j-ADV-QUANTUM-CHEM,
  volume =       "1",
  pages =        "vii--viii",
  year =         "1964",
  CODEN =        "AQCHA9",
  ISSN =         "0065-3276",
  bibdate =      "Thu Dec 28 12:02:12 2000",
  bibsource =    "OCR scan conversion",
  acknowledgement = ack-nhfb,
}

@InCollection{Lowdin:1964:SAD,
  author =       "Per-Olov L{\"o}wdin",
  editor =       "Bernard Pullman",
  booktitle =    "Electronic Aspects of Biochemistry: proceedings of the
                 International Symposium held at Ravello, Italy,
                 September 16--18, 1963,",
  title =        "Some Aspects on {DNA} Replication; Incorporation
                 Errors and Proton Transfer",
  publisher =    pub-AP,
  address =      pub-AP:adr,
  pages =        "??--??",
  year =         "1964",
  LCCN =         "QH345.A1 I5 1963; QU4 I58 1963",
  bibdate =      "Fri Nov 17 09:17:03 2000",
  bibsource =    "http://falcon.kvac.uu.se/swe/personal/PerOlovLowdinPub.html",
  acknowledgement = ack-nhfb,
  bookpages =    "xiii + 582",
}

@Article{Lowdin:1964:SAQ,
  author =       "Per-Olov L{\"o}wdin",
  title =        "Some Aspects of Quantum Biology",
  journal =      j-BIOPOLYMERS-SYMPOSIA,
  volume =       "1",
  number =       "??",
  pages =        "293--311",
  month =        may,
  year =         "1964",
  ISSN =         "0523-6827",
  bibdate =      "Fri Dec 15 17:40:48 2000",
  bibsource =    "http://falcon.kvac.uu.se/swe/personal/PerOlovLowdinPub.html",
  acknowledgement = ack-nhfb,
  xxnote =       "The journal `Biopolymers' has volume 1 in this year,
                 but University of Utah Marriott library does not have a
                 corresponding `Biopolymers Symposia' series??",
}

@Article{Lowdin:1964:SPTa,
  author =       "Per-Olov L{\"o}wdin",
  title =        "Studies in Perturbation Theory. {II}. {Generalization}
                 of the {Brillouin-Wigner} Formalism",
  journal =      j-J-MOL-SPECTROSC,
  volume =       "13",
  number =       "3",
  pages =        "326--331",
  month =        jul,
  year =         "1964",
  CODEN =        "JMOSA3",
  ISSN =         "0022-2852",
  bibdate =      "Thu Nov 16 12:07:42 2000",
  bibsource =    "http://falcon.kvac.uu.se/swe/personal/PerOlovLowdinPub.html;
                 nhfb-allref.bib",
  acknowledgement = ack-nhfb,
  journalabr =   "J. Mol. Spect.",
}

@Article{Lowdin:1964:SPTb,
  author =       "Per-Olov L{\"o}wdin",
  title =        "Studies in Perturbation Theory. {III}. {Solution} of
                 the {Schr{\"o}dinger} Equation under a Variation of a
                 Parameter",
  journal =      j-J-MOL-SPECTROSC,
  volume =       "13",
  number =       "3",
  pages =        "331--337",
  month =        jul,
  year =         "1964",
  CODEN =        "JMOSA3",
  ISSN =         "0022-2852",
  bibdate =      "Fri Dec 15 18:54:16 2000",
  bibsource =    "http://falcon.kvac.uu.se/swe/personal/PerOlovLowdinPub.html",
  acknowledgement = ack-nhfb,
}

@Article{Lowdin:1964:SPTc,
  author =       "Per-Olov L{\"o}wdin",
  title =        "Studies in Perturbation Theory. {VI}. {Contraction} of
                 Secular Equations",
  journal =      j-J-MOL-SPECTROSC,
  volume =       "14",
  number =       "1",
  pages =        "112--118",
  month =        oct,
  year =         "1964",
  CODEN =        "JMOSA3",
  ISSN =         "0022-2852",
  bibdate =      "Thu Nov 16 12:07:42 2000",
  bibsource =    "http://falcon.kvac.uu.se/swe/personal/PerOlovLowdinPub.html;
                 nhfb-allref.bib",
  acknowledgement = ack-nhfb,
  journalabr =   "J. Mol. Spect.",
}

@Article{Lowdin:1964:SPTd,
  author =       "P.-O. L{\"o}wdin",
  title =        "Studies in Perturbation Theory. {VII}. {Localized}
                 Perturbation",
  journal =      j-J-MOL-SPECTROSC,
  volume =       "14",
  number =       "1",
  pages =        "119--130",
  month =        oct,
  year =         "1964",
  CODEN =        "JMOSA3",
  ISSN =         "0022-2852",
  bibdate =      "Fri Dec 15 18:55:05 2000",
  bibsource =    "http://falcon.kvac.uu.se/swe/personal/PerOlovLowdinPub.html;
                 nhfb-allref.bib",
  acknowledgement = ack-nhfb,
  journalabr =   "J. Mol. Spect.",
}

@Article{Lowdin:1964:SPTe,
  author =       "P.-O. L{\"o}wdin",
  title =        "Studies in Perturbation Theory. {VIII}. {Separation}
                 of {Dirac} Equation and Study of the Spin-Orbit
                 Coupling and {Fermi} Contact Terms",
  journal =      j-J-MOL-SPECTROSC,
  volume =       "14",
  number =       "1",
  pages =        "131--144",
  month =        oct,
  year =         "1964",
  CODEN =        "JMOSA3",
  ISSN =         "0022-2852",
  bibdate =      "Thu Nov 16 12:07:42 2000",
  bibsource =    "http://falcon.kvac.uu.se/swe/personal/PerOlovLowdinPub.html;
                 nhfb-allref.bib",
  acknowledgement = ack-nhfb,
  journalabr =   "J. Mol. Spect.",
}

@Article{Hirschfelder:1965:LRI,
  author =       "J. O. Hirschfelder and Per-Olov L{\"o}wdin",
  title =        "Long-Range Interaction of Two $1s$-Hydrogen Atoms
                 Expressed in Terms of Natural Spin-Orbitals",
  journal =      j-MOL-PHYS,
  volume =       "9",
  number =       "5",
  pages =        "491--496",
  year =         "1965",
  CODEN =        "MOPHAM",
  ISSN =         "0026-8976",
  bibdate =      "Fri Nov 17 09:22:08 2000",
  bibsource =    "http://falcon.kvac.uu.se/swe/personal/PerOlovLowdinPub.html",
  acknowledgement = ack-nhfb,
  annote =       "No months assigned to journal issues.",
  journalabr =   "Mol. Phys.",
}

@Article{Lowdin:1965:AOD,
  author =       "Per-Olov L{\"o}wdin",
  title =        "Arvsanlagen och Deras {F}{\"o}r{\"a}ndringar --- Ur
                 Kvantgenetisk Synpunkt. ({Swedish}) [Inheritance and
                 its Changes --- From a Quantum Genetic Viewpoint]",
  journal =      j-SVENSK-NATURVETENSKAP,
  volume =       "??",
  number =       "??",
  pages =        "??--??",
  year =         "1965",
  CODEN =        "SVNAB5",
  ISSN =         "????",
  bibdate =      "Fri Nov 17 09:20:53 2000",
  bibsource =    "http://falcon.kvac.uu.se/swe/personal/PerOlovLowdinPub.html",
  acknowledgement = ack-nhfb,
  language =     "Swedish",
}

@TechReport{Lowdin:1965:CUL,
  author =       "P.-O. L{\"o}wdin",
  title =        "The Calculation of Upper and Lower Bounds of Energy
                 Eigenvalues in Perturbation Theory by Means of
                 Partitioning Technique",
  number =       "150",
  institution =  inst-KKUU,
  address =      inst-KKUU:adr,
  month =        jul,
  year =         "1965",
  bibdate =      "Thu Nov 16 12:07:42 2000",
  bibsource =    "nhfb-allref.bib",
  acknowledgement = ack-nhfb,
}

@Article{Lowdin:1965:IET,
  author =       "Per-Olov L{\"o}wdin",
  title =        "Isotope Effect in Tunneling and Its Influence on
                 Mutation Rates",
  journal =      j-MUTAT-RES,
  volume =       "2",
  number =       "3",
  pages =        "218--221",
  month =        jun,
  year =         "1965",
  CODEN =        "MUREAV",
  ISSN =         "0027-5107",
  bibdate =      "Thu Dec 28 15:59:12 2000",
  bibsource =    "http://falcon.kvac.uu.se/swe/personal/PerOlovLowdinPub.html;
                 MEDLINE database",
  acknowledgement = ack-nhfb,
}

@Article{Lowdin:1965:P,
  author =       "Per-Olov L{\"o}wdin",
  title =        "Preface",
  journal =      j-ADV-QUANTUM-CHEM,
  volume =       "2",
  pages =        "vii--viii",
  year =         "1965",
  CODEN =        "AQCHA9",
  ISSN =         "0065-3276",
  bibdate =      "Thu Dec 28 12:02:58 2000",
  bibsource =    "OCR scan conversion",
  acknowledgement = ack-nhfb,
}

@Article{Lowdin:1965:PISb,
  author =       "Per-Olov L{\"o}wdin",
  title =        "{Proceedings of the International Symposium on Atomic
                 and Molecular Orbital Quantum Theory, Dedicated to
                 Professor Robert Sanderson Mulliken, Sanibel Island,
                 Florida, 18--23 January 1965: Introduction}",
  journal =      j-J-CHEM-PHYS,
  volume =       "43",
  number =       "10 (part 2)",
  pages =        "S1--S1",
  day =          "15",
  month =        nov,
  year =         "1965",
  CODEN =        "JCPSA6",
  ISSN =         "0021-9606",
  bibdate =      "Fri Dec 15 18:41:48 2000",
  acknowledgement = ack-nhfb,
}

@Article{Lowdin:1965:QGA,
  author =       "Per-Olov L{\"o}wdin",
  title =        "Quantum Genetics and the Aperiodic Solid. {Some}
                 Aspects of the Biological Problems of Heredity,
                 Mutations, Aging and Tumors in View of the Quantum
                 Theory of the {DNA} Molecule",
  journal =      j-ADV-QUANTUM-CHEM,
  volume =       "2",
  pages =        "213--360",
  year =         "1965",
  CODEN =        "AQCHA9",
  ISSN =         "0065-3276",
  bibdate =      "Wed Dec 27 09:41:16 2000",
  bibsource =    "http://falcon.kvac.uu.se/swe/personal/PerOlovLowdinPub.html;
                 OCR scan conversion",
  acknowledgement = ack-nhfb,
  toc =          "I. Introduction 216;\\
                 II. Historical Development of the Theory of the
                 Hereditary Mechanism 222;\\
                 III. Stereostructure of DNA and the Connection with Its
                 Biological Functioning 233;\\
                 IV. Properties of the Hydrogen Bond 248;\\
                 V. Quantum Theory of DNA 286;\\
                 VI. Some Remarks on the Replication of DNA, the
                 Formation of RNA, and the Coding Problem 308;\\
                 VII. Problem of Mutations 333;\\
                 VIII. Problem of Aging 339;\\
                 IX. Some Aspects on the Connection between the DNA
                 Structure and the Development of Tumors and Cancer
                 341;\\
                 X. Discussion 348;\\
                 References 351",
}

@TechReport{Lowdin:1965:QTT,
  author =       "Per-Olov L{\"o}wdin",
  title =        "Quantum Theory of Time-Dependent Phenomena Treated by
                 the Evolution Operator Technique",
  type =         "Technical report",
  number =       "TN 100",
  institution =  inst-KKUU,
  address =      inst-KKUU:adr,
  day =          "15",
  month =        jun,
  year =         "1965",
  bibdate =      "Fri Dec 22 12:54:21 2000",
  acknowledgement = ack-nhfb,
}

@Article{Lowdin:1965:SPTa,
  author =       "Per-Olov L{\"o}wdin",
  title =        "Studies in perturbation theory. {IX}. {Connection}
                 between various approaches in the recent development.
                 Evaluation of upper bounds to energy eigenvalues in
                 {Schr{\"o}dinger}'s perturbation theory",
  journal =      j-J-MATH-PHYS,
  volume =       "6",
  number =       "8",
  pages =        "1341--1353",
  month =        aug,
  year =         "1965",
  CODEN =        "JMAPAQ",
  ISSN =         "0022-2488",
  MRclass =      "81.41",
  MRnumber =     "31 #5472",
  MRreviewer =   "A. C. Hurley",
  bibdate =      "Fri Dec 15 18:51:06 2000",
  bibsource =    "http://falcon.kvac.uu.se/swe/personal/PerOlovLowdinPub.html;
                 MathSciNet database; nhfb-allref.bib; Zentralblatt Math
                 database",
  acknowledgement = ack-nhfb,
  keywords =     "quantum theory",
  ZMnumber =     "136.47101",
}

@Article{Lowdin:1965:SPTb,
  author =       "Per-Olov L{\"o}wdin",
  title =        "Studies in Perturbation Theory. {X}. {Lower} Bounds to
                 Energy Eigenvalues in Perturbation Theory. {Ground}
                 State",
  journal =      j-PHYS-REV,
  volume =       "139",
  number =       "2A",
  pages =        "A357--A372",
  day =          "19",
  month =        jul,
  year =         "1965",
  CODEN =        "PHRVAO",
  ISSN =         "0031-899X",
  MRclass =      "81.41",
  MRnumber =     "32 #5242",
  MRreviewer =   "A. C. Hurley",
  bibdate =      "Tue Dec 26 12:43:53 2000",
  bibsource =    "http://falcon.kvac.uu.se/swe/personal/PerOlovLowdinPub.html;
                 MathSciNet database; nhfb-allref.bib",
  acknowledgement = ack-nhfb,
}

@Article{Lowdin:1965:SPTc,
  author =       "Per-Olov L{\"o}wdin",
  title =        "Studies in perturbation theory. {XI}. {Lower} bounds
                 to energy eigenvalues, ground state, and excited
                 states",
  journal =      j-J-CHEM-PHYS,
  volume =       "43",
  number =       "10 (part 2)",
  pages =        "S175--S185",
  day =          "15",
  month =        nov,
  year =         "1965",
  CODEN =        "JCPSA6",
  ISSN =         "0021-9606",
  MRclass =      "81.41",
  MRnumber =     "32 #3668",
  MRreviewer =   "A. C. Hurley",
  bibdate =      "Fri Dec 15 18:45:52 2000",
  bibsource =    "http://falcon.kvac.uu.se/swe/personal/PerOlovLowdinPub.html;
                 MathSciNet database; nhfb-allref.bib",
  acknowledgement = ack-nhfb,
}

@InCollection{Lowdin:1966:CPJ,
  author =       "Per-Olov L{\"o}wdin",
  title =        "Comments on {Professor John C. Slater}'s Paper,
                 {``Cohesion in Monovalent Metals''},",
  crossref =     "Lowdin:1966:QTA",
  pages =        "15--??",
  year =         "1966",
  bibdate =      "Fri Nov 17 09:23:58 2000",
  bibsource =    "http://falcon.kvac.uu.se/swe/personal/PerOlovLowdinPub.html",
  acknowledgement = ack-nhfb,
}

@InCollection{Lowdin:1966:CUL,
  author =       "Per-Olov L{\"o}wdin",
  booktitle =    "Perturbation Theory and its Applications in Quantum
                 Mechanics (Proc. Adv. Sem. Math. Res. Center, U.S.
                 Army, Theoret. Chem. Inst., Univ. of Wisconsin,
                 Madison, Wis., 1965)",
  title =        "The calculation of upper and lower bounds of energy
                 eigenvalues in perturbation theory by means of
                 partitioning techniques",
  publisher =    pub-WILEY,
  address =      pub-WILEY:adr,
  pages =        "255--294",
  year =         "1966",
  MRclass =      "81.41",
  MRnumber =     "34 #5410",
  MRreviewer =   "H. W. Lewis",
  bibdate =      "Thu Nov 16 11:51:44 MST 2000",
  bibsource =    "http://falcon.kvac.uu.se/swe/personal/PerOlovLowdinPub.html;
                 MathSciNet database; Zentralblatt Math database",
  acknowledgement = ack-nhfb,
  ZMnumber =     "194.28905",
}

@TechReport{Lowdin:1966:GAC,
  author =       "Per-Olov L{\"o}wdin",
  title =        "Group Algebra, Convolution Algebra, and Applications
                 to Quantum Mechanics",
  type =         "Technical report",
  number =       "TN 176",
  institution =  inst-KKUU,
  address =      inst-KKUU:adr,
  day =          "15",
  month =        jul,
  year =         "1966",
  bibdate =      "Fri Dec 22 12:54:21 2000",
  acknowledgement = ack-nhfb,
}

@TechReport{Lowdin:1966:PHFa,
  author =       "Per-Olov L{\"o}wdin",
  title =        "The Projected {Hartree-Fock} Method",
  type =         "Technical report",
  number =       "TN 170",
  institution =  inst-KKUU,
  address =      inst-KKUU:adr,
  day =          "1",
  month =        mar,
  year =         "1966",
  bibdate =      "Fri Dec 22 12:54:21 2000",
  acknowledgement = ack-nhfb,
}

@TechReport{Lowdin:1966:PHFb,
  author =       "P.-O. L{\"o}wdin",
  title =        "The Projected {Hartree-Fock} Method",
  type =         "Technical report",
  number =       "TF 83",
  institution =  inst-QTP,
  address =      inst-QTP:adr,
  month =        mar,
  year =         "1966",
  bibdate =      "Thu Nov 16 12:07:42 2000",
  bibsource =    "nhfb-allref.bib",
  acknowledgement = ack-nhfb,
}

@InCollection{Lowdin:1966:PHFc,
  author =       "Per-Olov L{\"o}wdin",
  title =        "The Projected {Hartree-Fock} Method. {An} Extension of
                 the Independent-Particles Schemes",
  crossref =     "Lowdin:1966:QTA",
  pages =        "601--??",
  year =         "1966",
  bibdate =      "Fri Nov 17 09:23:58 2000",
  bibsource =    "http://falcon.kvac.uu.se/swe/personal/PerOlovLowdinPub.html",
  acknowledgement = ack-nhfb,
}

@TechReport{Lowdin:1966:SPH,
  author =       "Per-Olov L{\"o}wdin",
  title =        "Some Properties of the Hydrogen Bond in Biochemistry
                 with Particular Reference to the Stability of the
                 Genetic Code",
  type =         "Technical report",
  number =       "QB 33",
  institution =  inst-KKUU,
  address =      inst-KKUU:adr,
  day =          "31",
  month =        aug,
  year =         "1966",
  bibdate =      "Fri Dec 22 12:54:21 2000",
  acknowledgement = ack-nhfb,
}

@InProceedings{Lowdin:1966:SPT,
  author =       "P.-O. L{\"o}wdin",
  editor =       "C. H. Wilcox",
  booktitle =    "Perturbation Theory",
  title =        "Studies in Perturbation Theory. {XII}. {The}
                 Calculation of Upper and Lower Bounds of Energy
                 Eigenvalues in Perturbation Theory by Means of
                 Partitioning Techniques",
  publisher =    pub-WILEY,
  address =      pub-WILEY:adr,
  pages =        "255--294",
  year =         "1966",
  bibdate =      "Thu Nov 16 12:07:42 2000",
  bibsource =    "nhfb-allref.bib",
  acknowledgement = ack-nhfb,
}

@Article{Lowdin:1967:EPL,
  author =       "P.-O. L{\"o}wdin",
  title =        "Eigenvalue Problem in a Linearly Dependent Basis and
                 the Super Secular Equation",
  journal =      j-IJQC-SYMP,
  volume =       "1",
  pages =        "811--827",
  year =         "1967",
  CODEN =        "IJQSAF",
  ISSN =         "0538-821X",
  bibdate =      "Sat Nov 18 09:39:03 2000",
  bibsource =    "ftp://ftp.math.utah.edu/pub/tex/bib/ijqc.bib;
                 http://falcon.kvac.uu.se/swe/personal/PerOlovLowdinPub.html;
                 nhfb-allref.bib",
  acknowledgement = ack-nhfb,
}

@Article{Lowdin:1967:GAC,
  author =       "Per-Olov L{\"o}wdin",
  title =        "Group Algebra, Convolution Algebra, and Applications
                 To Quantum Mechanics",
  journal =      j-REV-MOD-PHYS,
  volume =       "39",
  number =       "2",
  pages =        "259--287",
  month =        apr,
  year =         "1967",
  CODEN =        "RMPHAT",
  ISSN =         "0034-6861",
  MRclass =      "81.22 (22.65)",
  MRnumber =     "34 #8769",
  bibdate =      "Fri Dec 15 19:35:11 2000",
  bibsource =    "http://falcon.kvac.uu.se/swe/personal/PerOlovLowdinPub.html;
                 MathSciNet database; nhfb-allref.bib; Zentralblatt Math
                 database",
  acknowledgement = ack-nhfb,
  keywords =     "quantum theory",
  ZMnumber =     "163.21801",
}

@Article{Lowdin:1967:NQC,
  author =       "P.-O. L{\"o}wdin",
  title =        "Nature of Quantum Chemistry",
  journal =      j-IJQC,
  volume =       "1",
  number =       "1",
  pages =        "7--12",
  month =        "????",
  year =         "1967",
  CODEN =        "IJQCB2",
  ISSN =         "0020-7608 (print), 1097-461X (electronic)",
  bibdate =      "Sat Dec 16 10:40:43 2000",
  bibsource =    "ftp://ftp.math.utah.edu/pub/tex/bib/ijqc.bib;
                 http://falcon.kvac.uu.se/swe/personal/PerOlovLowdinPub.html;
                 IEEE INSPEC database (1968--2000); nhfb-allref.bib",
  abstract =     "Tries to distinguish clearly between the mathematical
                 and logical treatment itself and the physical and
                 chemical arguments. This is not always so easy. If an
                 experimental description of a problem is given, the
                 clear logical and mathematical analysis of the
                 situation and the theoretical formulation of the
                 problem is often the most difficult part of the
                 treatment. Once this has been achieved, it is easier to
                 proceed. It is then of great importance that the basic
                 assumptions are clearly stated, and the mathematical
                 and logical treatment should further be carried out
                 strictly as far as is possible",
  acknowledgement = ack-nhfb,
  annote =       "Sanibel Symposium in honor of John C. Slater
                 \cite{Lowdin:1967:PIS}.",
}

@Article{Lowdin:1967:Pa,
  author =       "Per-Olov L{\"o}wdin",
  title =        "Preface",
  journal =      j-ADV-QUANTUM-CHEM,
  volume =       "3",
  pages =        "vii--vii",
  year =         "1967",
  CODEN =        "AQCHA9",
  ISSN =         "0065-3276",
  bibdate =      "Wed Dec 27 09:41:16 2000",
  bibsource =    "OCR scan conversion",
  acknowledgement = ack-nhfb,
}

@Article{Lowdin:1967:Pb,
  author =       "P.-O. L{\"o}wdin",
  title =        "Program",
  journal =      j-IJQC,
  volume =       "1",
  number =       "1",
  pages =        "1--6",
  month =        "????",
  year =         "1967",
  CODEN =        "IJQCB2",
  ISSN =         "0020-7608 (print), 1097-461X (electronic)",
  bibdate =      "Fri Dec 15 17:43:01 2000",
  bibsource =    "ftp://ftp.math.utah.edu/pub/tex/bib/ijqc.bib;
                 http://falcon.kvac.uu.se/swe/personal/PerOlovLowdinPub.html;
                 nhfb-allref.bib",
  acknowledgement = ack-nhfb,
  annote =       "Sanibel Symposium in honor of John C. Slater
                 \cite{Lowdin:1967:PIS}.",
}

@Article{Lowdin:1967:QTT,
  author =       "Per-Olov L{\"o}wdin",
  title =        "Quantum Theory of Time-Dependent Phenomena Treated by
                 the Evolution Operator Technique",
  journal =      j-ADV-QUANTUM-CHEM,
  volume =       "3",
  pages =        "323--381",
  year =         "1967",
  CODEN =        "AQCHA9",
  ISSN =         "0065-3276",
  bibdate =      "Wed Dec 27 09:41:16 2000",
  bibsource =    "http://falcon.kvac.uu.se/swe/personal/PerOlovLowdinPub.html;
                 OCR scan conversion",
  note =         "Earlier edition available as technical report
                 \cite{Lowdin:1963:QG}.",
  acknowledgement = ack-nhfb,
  toc =          "I. Introduction 324;\\
                 II. Coordinate Space and Momentum Space; Phase Problem
                 in Quantum Mechanics 332;\\
                 III. Schr{\"o}dinger Equation 340;\\
                 IV. Schr{\"o}dinger Equation for Particles in
                 Electromagnetic Field 347;\\
                 V. Evolution Operator 355;\\
                 VI. Reformulation of Quantum Theory 361;\\
                 VII. Transition Probabilities 363;\\
                 VIII. Time-Dependent Perturbation Theory 371;\\
                 IX. Discussion 378;\\
                 APPENDIX. Evaluation of Certain Integrals 379;\\
                 References 381",
}

@Article{Lowdin:1967:SPH,
  author =       "Per-Olov L{\"o}wdin",
  title =        "Some Properties of the Hydrogen Bonds in Biochemistry
                 with Particular Reference to the Stability of the
                 Genetic Code",
  journal =      "Pontificaiae Academiae Scientiarum Scripta Varia",
  volume =       "31",
  number =       "??",
  pages =        "??--??",
  year =         "1967",
  CODEN =        "????",
  ISSN =         "????",
  bibdate =      "Fri Nov 17 09:37:46 2000",
  bibsource =    "http://falcon.kvac.uu.se/swe/personal/PerOlovLowdinPub.html",
  note =         "Semaine d'Etude sur les Forces Moleculaires.",
  acknowledgement = ack-nhfb,
}

@Article{Lindner:1968:ULB,
  author =       "Peter Lindner and Per-Olov L{\"o}wdin",
  title =        "Upper and Lower Bounds in Second-Order Perturbation
                 Theory and the {Uns{\"o}ld} Approximation",
  journal =      j-IJQC-SYMP,
  volume =       "2",
  pages =        "161--173",
  year =         "1968",
  CODEN =        "IJQSAF",
  ISSN =         "0538-821X",
  bibdate =      "Sat Nov 18 09:39:26 2000",
  bibsource =    "ftp://ftp.math.utah.edu/pub/tex/bib/ijqc.bib;
                 http://falcon.kvac.uu.se/swe/personal/PerOlovLowdinPub.html;
                 nhfb-allref.bib",
  acknowledgement = ack-nhfb,
}

@InProceedings{Lowdin:1968:MAB,
  author =       "Per-Olov L{\"o}wdin",
  editor =       "Bernard Pullman",
  booktitle =    "Molecular Associations in Biology: Proceedings of an
                 international symposium held in celebration of the 40th
                 anniversary of the Institut de biologie
                 physico-chimique (Foundation Edmond de Rothschild)
                 Paris, May 8--11, 1967",
  title =        "Molecular Associations in Biology --- {A} Brief
                 Summary",
  publisher =    pub-AP,
  address =      pub-AP:adr,
  pages =        "539--549",
  year =         "1968",
  LCCN =         "QH506 .M718 1967",
  bibdate =      "Mon Dec 18 10:51:47 2000",
  bibsource =    "http://falcon.kvac.uu.se/swe/personal/PerOlovLowdinPub.html",
  acknowledgement = ack-nhfb,
  bookpages =    "xviii + 571",
}

@TechReport{Lowdin:1968:NOP,
  author =       "P.-O. L{\"o}wdin",
  title =        "On the Non-Orthogonality Problem",
  type =         "Technical Report",
  number =       "TF 146",
  institution =  inst-QTP,
  address =      inst-QTP:adr,
  month =        jun,
  year =         "1968",
  bibdate =      "Tue Dec 05 05:49:44 2000",
  bibsource =    "nhfb-allref.bib",
  note =         "Published in \cite{Lowdin:1970:NOP}.",
  acknowledgement = ack-nhfb,
}

@Article{Lowdin:1968:P,
  author =       "Per-Olov L{\"o}wdin",
  title =        "Preface",
  journal =      j-ADV-QUANTUM-CHEM,
  volume =       "4",
  pages =        "vii--vii",
  year =         "1968",
  CODEN =        "AQCHA9",
  ISSN =         "0065-3276",
  bibdate =      "Sat Dec 30 14:22:29 2000",
  bibsource =    "OCR scan conversion",
  acknowledgement = ack-nhfb,
  xxnote =       "Check pages?? Why is there a gap viii--xiii??",
}

@TechReport{Lowdin:1968:SACa,
  author =       "P.-O. L{\"o}wdin",
  title =        "Some Aspects of the Correlation Problem and Possible
                 Extensions of the {Independent Particle Model}",
  type =         "Technical Report",
  number =       "TF 128",
  institution =  inst-QTP,
  address =      inst-QTP:adr,
  year =         "1968",
  bibdate =      "Thu Nov 16 12:07:42 2000",
  bibsource =    "nhfb-allref.bib",
  note =         "Published in \cite{Lowdin:1968:SACb}.",
  acknowledgement = ack-nhfb,
}

@Article{Lowdin:1968:SACb,
  author =       "P.-O. L{\"o}wdin",
  title =        "Some Aspects of the Correlation Problem and Possible
                 Extensions of the {Independent Particle Model}",
  journal =      j-ADV-CHEM-PHYS,
  volume =       "14",
  pages =        "283--340",
  year =         "1968",
  CODEN =        "ADCPAA",
  ISSN =         "0065-2385",
  bibdate =      "Fri Dec 15 17:34:32 2000",
  bibsource =    "http://falcon.kvac.uu.se/swe/personal/PerOlovLowdinPub.html;
                 nhfb-allref.bib",
  note =         "Proceedings of Frascati Summer School on the
                 Correlation Problem, 1967; Eds. R. Lefebvre and C.
                 Moser, Interscience, 1968. Also available as
                 \cite{Lowdin:1968:SACa}.",
  acknowledgement = ack-nhfb,
  annote =       "Annual book series: no issue numbers.",
  journalabr =   "Adv. Chem. Phys.",
}

@InProceedings{Lowdin:1968:SAP,
  author =       "Per-Olov L{\"o}wdin",
  editor =       "????",
  booktitle =    "Proceedings of the Israel Academy of Sciences
                 Symposium on Physico-Chemical Mechanism of
                 Carcinogenesis, Jerusalem",
  title =        "Some Aspects on the Possible Importance of the Reading
                 Mechanism of {DNA} in Carcinogenesis",
  publisher =    "????",
  address =      "????",
  pages =        "??--??",
  year =         "1968",
  LCCN =         "????",
  bibdate =      "Fri Nov 17 09:42:41 2000",
  bibsource =    "http://falcon.kvac.uu.se/swe/personal/PerOlovLowdinPub.html",
  acknowledgement = ack-nhfb,
}

@InProceedings{Lowdin:1968:SAS,
  author =       "Per-Olov L{\"o}wdin",
  editor =       "Ram{\'o}n Carb{\'o}",
  booktitle =    "Proc. Girona Workshop on Quantum Chemistry",
  title =        "Some Aspects on the Structure and Present Situation of
                 Quantum Chemistry as Expressed at the {Girona
                 Workshop}",
  publisher =    pub-ELSEVIER,
  address =      pub-ELSEVIER:adr,
  pages =        "605--??",
  year =         "1968",
  ISBN =         "????",
  LCCN =         "????",
  bibdate =      "Mon Dec 18 10:50:59 2000",
  bibsource =    "http://falcon.kvac.uu.se/swe/personal/PerOlovLowdinPub.html",
  acknowledgement = ack-nhfb,
  xxnote =       "Year probably wrong: see \cite{Lowdin:1988:SAS}.",
}

@Article{Lowdin:1968:SCT,
  author =       "P.-O. L{\"o}wdin",
  title =        "Some Comments on the Treatment of Symmetry Properties
                 in Perturbation Theory",
  journal =      j-IJQC-SYMP,
  volume =       "2",
  pages =        "137--150",
  year =         "1968",
  CODEN =        "IJQSAF",
  ISSN =         "0538-821X",
  bibdate =      "Sat Nov 18 09:39:31 2000",
  bibsource =    "ftp://ftp.math.utah.edu/pub/tex/bib/ijqc.bib;
                 http://falcon.kvac.uu.se/swe/personal/PerOlovLowdinPub.html;
                 nhfb-allref.bib",
  acknowledgement = ack-nhfb,
}

@Article{Lowdin:1968:SPTa,
  author =       "P.-O. L{\"o}wdin",
  title =        "Studies in Perturbation Theory. {XIII}. {Treatment} of
                 Constants of Motion in Resolvent Method, Partitioning
                 Technique, and Perturbation Theory",
  journal =      j-IJQC,
  volume =       "2",
  number =       "6",
  pages =        "867--931",
  month =        nov,
  year =         "1968",
  CODEN =        "IJQCB2",
  ISSN =         "0020-7608 (print), 1097-461X (electronic)",
  bibdate =      "Fri Dec 15 17:45:41 2000",
  bibsource =    "ftp://ftp.math.utah.edu/pub/tex/bib/ijqc.bib;
                 http://falcon.kvac.uu.se/swe/personal/PerOlovLowdinPub.html;
                 nhfb-allref.bib",
  acknowledgement = ack-nhfb,
}

@InProceedings{Lowdin:1968:UIP,
  author =       "Per-Olov L{\"o}wdin",
  editor =       "Ram{\'o}n Carb{\'o}",
  booktitle =    "Proc. Girona Workshop on Quantum Chemistry",
  title =        "The Use of Inner Projections and Rational
                 Approximations in the Future of Quantum Chemistry",
  publisher =    pub-ELSEVIER,
  address =      pub-ELSEVIER:adr,
  pages =        "1--??",
  year =         "1968",
  ISBN =         "????",
  LCCN =         "????",
  bibdate =      "Mon Dec 18 10:50:55 2000",
  bibsource =    "http://falcon.kvac.uu.se/swe/personal/PerOlovLowdinPub.html",
  acknowledgement = ack-nhfb,
}

@Article{MacIntyre:1968:EED,
  author =       "W. M. MacIntyre and Per-Olov L{\"o}wdin",
  title =        "Electronic Energy of the {DNA} Replication Plane",
  journal =      j-IJQC-SYMP,
  volume =       "2",
  pages =        "207--217",
  year =         "1968",
  CODEN =        "IJQSAF",
  ISSN =         "0538-821X",
  bibdate =      "Fri Dec 15 18:31:20 2000",
  bibsource =    "http://falcon.kvac.uu.se/swe/personal/PerOlovLowdinPub.html",
  acknowledgement = ack-nhfb,
}

@Article{Lowdin:1969:EPS,
  author =       "P.-O. L{\"o}wdin and O. Goscinski",
  title =        "The Exchange Phenomenon, the Symmetric Group, and the
                 Spin Degeneracy Problem",
  journal =      j-IJQC-SYMP,
  volume =       "3",
  pages =        "533--591",
  year =         "1969",
  CODEN =        "IJQSAF",
  ISSN =         "0538-821X",
  bibdate =      "Sat Nov 18 09:39:33 2000",
  bibsource =    "ftp://ftp.math.utah.edu/pub/tex/bib/ijqc.bib;
                 http://falcon.kvac.uu.se/swe/personal/PerOlovLowdinPub.html;
                 nhfb-allref.bib",
  acknowledgement = ack-nhfb,
}

@Article{Lowdin:1969:PCU,
  author =       "P.-O. L{\"o}wdin",
  title =        "Perturbation calculation of the upper and lower limits
                 of energy eigenvalues by partitioning technique",
  journal =      j-M-FIZ-F,
  volume =       "17",
  number =       "6",
  pages =        "515--540",
  year =         "1969",
  CODEN =        "MGFFAC",
  ISSN =         "0025-0104",
  bibdate =      "Sat Dec 16 10:40:43 2000",
  bibsource =    "IEEE INSPEC database (1968--2000)",
}

@Article{Lowdin:1969:PHF,
  author =       "P.-O. L{\"o}wdin",
  title =        "The projected {Hartree-Fock} method for the extension
                 of the independent particle model",
  journal =      j-M-FIZ-F,
  volume =       "17",
  number =       "6",
  pages =        "495--514",
  year =         "1969",
  CODEN =        "MGFFAC",
  ISSN =         "0025-0104",
  bibdate =      "Sat Dec 16 10:40:43 2000",
  bibsource =    "IEEE INSPEC database (1968--2000)",
  abstract =     "The physical understanding of the structure of atoms
                 molecules and nuclei is based on the independent
                 particle model and Slater determinants and the
                 Hartree-Fock method are extensively used as
                 mathematical tools within the model. The dilemma of the
                 symmetry of the Hartree-Fock method involving Slater
                 determinants is discussed. The projected Hartree-Fock
                 method is described and correlation problems are dealt
                 with",
}

@Article{Lowdin:1969:POS,
  author =       "Manuel Berrondo and Per-Olov L{\"o}wdin",
  title =        "The Projection Operator for a Space Spanned by a
                 Linearly Dependent Set",
  journal =      j-IJQC,
  volume =       "3",
  number =       "6",
  pages =        "767--780",
  month =        nov,
  year =         "1969",
  CODEN =        "IJQCB2",
  ISSN =         "0020-7608 (print), 1097-461X (electronic)",
  bibdate =      "Fri Dec 15 17:46:25 2000",
  bibsource =    "http://falcon.kvac.uu.se/swe/personal/PerOlovLowdinPub.html",
  acknowledgement = ack-nhfb,
}

@Article{Lowdin:1969:SAH,
  author =       "Per-Olov L{\"o}wdin",
  title =        "Some Aspects of the Hydrogen Bond in Molecular
                 Biology",
  journal =      j-ANN-NY-ACAD-SCI,
  volume =       "158",
  number =       "1",
  pages =        "86--95",
  day =          "16",
  month =        may,
  year =         "1969",
  CODEN =        "ANYAA9",
  ISSN =         "0077-8923",
  bibdate =      "Thu Dec 28 15:58:23 2000",
  bibsource =    "http://falcon.kvac.uu.se/swe/personal/PerOlovLowdinPub.html;
                 MEDLINE database",
  acknowledgement = ack-nhfb,
}

@Article{Lowdin:1969:SCP,
  author =       "Per-Olov L{\"o}wdin",
  title =        "Some Comments on the Periodic System of the Elements",
  journal =      j-IJQC-SYMP,
  volume =       "3",
  pages =        "331--334",
  year =         "1969",
  CODEN =        "IJQSAF",
  ISSN =         "0538-821X",
  bibdate =      "Fri Nov 17 09:45:36 2000",
  bibsource =    "http://falcon.kvac.uu.se/swe/personal/PerOlovLowdinPub.html",
  acknowledgement = ack-nhfb,
}

@Article{Gruninger:1970:CAA,
  author =       "J. Gruninger and Y. {\"O}hrn and P.-O. L{\"o}wdin",
  title =        "Comments on the Analysis of Atomic Correlation
                 Energies",
  journal =      j-J-CHEM-PHYS,
  volume =       "52",
  number =       "11",
  pages =        "5551--5554",
  day =          "1",
  month =        jun,
  year =         "1970",
  CODEN =        "JCPSA6",
  ISSN =         "0021-9606",
  bibdate =      "Sat Dec 16 10:40:43 2000",
  bibsource =    "http://falcon.kvac.uu.se/swe/personal/PerOlovLowdinPub.html;
                 IEEE INSPEC database (1968--2000); nhfb-allref.bib",
  abstract =     "Analysis of correlation energies is advocated in terms
                 of average values of electronic kinetic energy,
                 electron-nuclear attraction energy, and
                 electron-electron repulsion energy, rather than pair
                 energies. Exploratory calculations on the two-electron
                 and three-electron isoelectronic sequences are
                 reported",
  acknowledgement = ack-nhfb,
}

@Article{Lowdin:1970:CLB,
  author =       "P.-O. L{\"o}wdin and T. K. Lim",
  title =        "Calculation of Lower Bounds To Energy Eigenvalues by
                 Reduced Density Matrices and the Representability
                 Problem",
  journal =      j-IJQC-SYMP,
  volume =       "3",
  pages =        "697--702",
  year =         "1970",
  CODEN =        "IJQSAF",
  ISSN =         "0538-821X",
  bibdate =      "Sat Nov 18 09:39:37 2000",
  bibsource =    "ftp://ftp.math.utah.edu/pub/tex/bib/ijqc.bib;
                 http://falcon.kvac.uu.se/swe/personal/PerOlovLowdinPub.html;
                 nhfb-allref.bib",
  acknowledgement = ack-nhfb,
}

@Article{Lowdin:1970:NP,
  author =       "Per-Olov L{\"o}wdin",
  title =        "On the Nonorthogonality Problem",
  journal =      j-ADV-QUANTUM-CHEM,
  volume =       "5",
  pages =        "185--199",
  year =         "1970",
  CODEN =        "AQCHA9",
  ISSN =         "0065-3276",
  bibdate =      "Thu Dec 28 12:04:04 2000",
  bibsource =    "http://falcon.kvac.uu.se/swe/personal/PerOlovLowdinPub.html;
                 OCR scan conversion",
  note =         "Contribution to {Professor Ivar Waller}'s 70-Year
                 Anniversary Volume. Earlier edition available as
                 technical report \cite{Lowdin:1968:NOP}.",
  acknowledgement = ack-nhfb,
  toc =          "I. Introduction 185;\\
                 II. Orthonormalization Procedures 187;\\
                 III. Further Aspects on the Nonorthogonality Problem
                 195;\\
                 IV. Calculations of Cohesive and Elastic Properties of
                 the Alkali Halides 196;\\
                 References 198",
}

@Article{Lowdin:1970:P,
  author =       "Per-Olov L{\"o}wdin",
  title =        "Preface",
  journal =      j-ADV-QUANTUM-CHEM,
  volume =       "5",
  pages =        "xi--xii",
  year =         "1970",
  CODEN =        "AQCHA9",
  ISSN =         "0065-3276",
  bibdate =      "Wed Dec 27 09:41:16 2000",
  bibsource =    "OCR scan conversion",
  acknowledgement = ack-nhfb,
}

@Article{Lowdin:1970:RCP,
  author =       "P.-O. L{\"o}wdin and J.-L. Calais and G. Sperber and
                 M. Hayns and T. Ahlenius",
  title =        "Research on cohesive properties of solids in the
                 {Uppsala} quantum chemistry group",
  journal =      "4th Nordic solid state conference (abstracts)",
  volume =       "",
  number =       "",
  pages =        "17",
  year =         "1970",
  bibdate =      "Sat Dec 16 10:40:43 2000",
  bibsource =    "IEEE INSPEC database (1968--2000)",
  abstract =     "Abstract only given substantially as follows. The
                 following are presented: Study of the correlation
                 energy in alkali metals: The alternant molecular
                 orbital method is used in a set of exploratory
                 calculations of the cohesive energy of the lithium
                 metal. The occupation of the AMO's --- the shape of the
                 `Fermi surface' --- is discussed, in particular with
                 respect to its influence on the density and the
                 cohesive energy. The internal pressure in alkali
                 halides: The concept of internal pressure is treated
                 with reference to existing theoretical models and
                 calculations. A generalization of Borelius' equation of
                 state is proposed. Cohesive energies and elastic
                 constants of the silver halides: These are calculated
                 from free ion Hartree-Fock orbitals by means of
                 L{\"o}wdin's method. Construction of an orthonormal
                 basis set suitable for crystals: A combination of
                 various types of orthogonalization procedures is used
                 to construct an orthonormal set of LCAO functions",
}

@InProceedings{Lowdin:1970:RRU,
  author =       "Per-Olov L{\"o}wdin",
  editor =       "????",
  booktitle =    "IBM Ludwigsburg Meeting Report",
  title =        "Recent Research in the {Uppsala} \& {Florida Quantum
                 Theory Projects}",
  publisher =    "IBM Corporation",
  address =      "????",
  pages =        "??--??",
  year =         "1970",
  LCCN =         "????",
  bibdate =      "Fri Nov 17 09:50:13 2000",
  bibsource =    "http://falcon.kvac.uu.se/swe/personal/PerOlovLowdinPub.html",
  acknowledgement = ack-nhfb,
}

@InCollection{Lowdin:1970:SARa,
  author =       "Per-Olov L{\"o}wdin",
  editor =       "J. Dalenius and G. Karlsson and S. Malmquist",
  booktitle =    "{Herman Wold} Dedicatory Volume",
  title =        "Some Aspects on the Research Process in the Natural
                 Sciences",
  publisher =    pub-ALMQVIST-WIKSELLS,
  address =      pub-ALMQVIST-WIKSELLS:adr,
  pages =        "112--??",
  year =         "1970",
  LCCN =         "????",
  bibdate =      "Fri Nov 17 09:47:39 2000",
  bibsource =    "http://falcon.kvac.uu.se/swe/personal/PerOlovLowdinPub.html",
  acknowledgement = ack-nhfb,
  xxnote =       "Is this the same as Lowdin:1970:SARb??",
}

@InCollection{Lowdin:1970:SARb,
  author =       "P.-O. L{\"o}wdin",
  booktitle =    "Scientists at Work",
  title =        "Some Aspects of the Research Process in the Natural
                 Sciences",
  publisher =    pub-ALMQVIST-WIKSELLS,
  address =      pub-ALMQVIST-WIKSELLS:adr,
  pages =        "??--??",
  year =         "1970",
  bibdate =      "Thu Nov 16 12:07:42 2000",
  bibsource =    "nhfb-allref.bib",
  acknowledgement = ack-nhfb,
  xxnote =       "Is this the same as Lowdin:1970:SARa??",
}

@Article{Lowdin:1971:QCM,
  author =       "P.-O. L{\"o}wdin",
  title =        "Quantum Chemistry and Molecular Physics of Solids",
  journal =      "Colloq. Int. Cont. Nat. Rech. Sci.",
  volume =       "195",
  number =       "??",
  pages =        "207--266",
  year =         "1971",
  CODEN =        "????",
  ISSN =         "????",
  bibdate =      "Thu Nov 16 12:07:42 2000",
  bibsource =    "nhfb-allref.bib",
  acknowledgement = ack-nhfb,
  xxnote =       "Check journal: should it be ``Coll. Int. Centre Nat.
                 Rech. Sci. Paris'' as in \cite{Lowdin:1958:SDP}??",
}

@Unpublished{Lowdin:1971:SCT,
  author =       "P.-O. L{\"o}wdin",
  title =        "Some Comments on the Time-Dependent Variation
                 Principle",
  pages =        "????",
  month =        dec,
  year =         "1971",
  bibdate =      "Thu Nov 16 12:07:42 2000",
  bibsource =    "nhfb-allref.bib",
  note =         "QTP notes. Published in \cite{Lowdin:1972:SCT}.",
  acknowledgement = ack-nhfb,
}

@Article{Lowdin:1971:SPI,
  author =       "P.-O. L{\"o}wdin",
  title =        "Some Properties of Inner Projections",
  journal =      j-IJQC-SYMP,
  volume =       "4",
  pages =        "231--237",
  year =         "1971",
  CODEN =        "IJQSAF",
  ISSN =         "0538-821X",
  bibdate =      "Mon Dec 18 11:05:26 2000",
  bibsource =    "ftp://ftp.math.utah.edu/pub/tex/bib/ijqc.bib;
                 http://falcon.kvac.uu.se/swe/personal/PerOlovLowdinPub.html;
                 IEEE INSPEC database (1968--2000); nhfb-allref.bib",
  abstract =     "Inner projections of positive-definite operators have
                 turned out to be of essential importance for
                 constructing lower bounds to self-adjoint operators
                 which are bounded from below. They have been utilized
                 to construct lower bounds to energy eigenvalues, and to
                 study the wave and reaction operators in modern
                 perturbation theory. A brief review is given of some of
                 the basic properties of the inner projections",
  acknowledgement = ack-nhfb,
}

@Article{Lowdin:1971:SPT,
  author =       "P.-O. L{\"o}wdin and O. Goscinski",
  title =        "Studies in Perturbation Theory. {XIV}. {Treatment} of
                 Constants of Motion, Degeneracies and Symmetry
                 Properties By Means of Multidimensional Partitioning",
  journal =      j-IJQC-SYMP,
  volume =       "5",
  pages =        "685--705",
  year =         "1971",
  CODEN =        "IJQSAF",
  ISSN =         "0538-821X",
  bibdate =      "Fri Dec 15 18:31:34 2000",
  bibsource =    "ftp://ftp.math.utah.edu/pub/tex/bib/ijqc.bib;
                 http://falcon.kvac.uu.se/swe/personal/PerOlovLowdinPub.html;
                 nhfb-allref.bib",
  acknowledgement = ack-nhfb,
}

@Unpublished{Lowdin:1971:TECa,
  author =       "P.-O. L{\"o}wdin",
  title =        "Treatment of Exchange and Correlation Effects in
                 Crystals. {An} Introduction",
  pages =        "????",
  month =        dec,
  year =         "1971",
  bibdate =      "Thu Nov 16 12:07:42 2000",
  bibsource =    "nhfb-allref.bib",
  note =         "QTP notes.",
  acknowledgement = ack-nhfb,
}

@InProceedings{Lowdin:1971:TECb,
  author =       "Per-Olov L{\"o}wdin",
  editor =       "Frank Herman and Norris W. Dalton and Thomas R.
                 Koehler",
  booktitle =    "Computational solid state physics; proceedings of an
                 international symposium held October 6--8, 1971, in
                 Wildbad, Germany",
  title =        "Treatment of Exchange and Correlation Effects in
                 Crystals. Introductory Remarks",
  publisher =    pub-PLENUM,
  address =      pub-PLENUM:adr,
  pages =        "191--204",
  year =         "1971",
  ISBN =         "0-306-30583-6",
  LCCN =         "QC176.A1 I581 1971",
  bibdate =      "Tue Dec 05 05:53:19 2000",
  bibsource =    "http://falcon.kvac.uu.se/swe/personal/PerOlovLowdinPub.html",
  series =       "IBM research symposia series",
  acknowledgement = ack-nhfb,
  bookpages =    "xiv + 450",
}

@Article{Laskowski:1972:TCM,
  author =       "Bernard Laskowski and Per-Olov L{\"o}wdin",
  title =        "Treatment of Constants of Motion in the Variation
                 Principle. {I}. {Symmetry} Properties of Variational
                 Wavefunctions",
  journal =      j-CHEM-PHYS-LETT,
  volume =       "16",
  number =       "1",
  pages =        "1--4",
  day =          "15",
  month =        sep,
  year =         "1972",
  CODEN =        "CHPLBC",
  ISSN =         "0009-2614",
  bibdate =      "Sat Dec 16 10:40:43 2000",
  bibsource =    "http://falcon.kvac.uu.se/swe/personal/PerOlovLowdinPub.html;
                 IEEE INSPEC database (1968--2000)",
  abstract =     "In connection with the Schr{\"o}dinger equation $H
                 \Psi = E \Psi$, the approximate eigenfunctions $\Phi$
                 situated within a subspace $M$ are studied by means of
                 the variation principle $\delta (H)=0$. It is shown
                 that, if the Hamiltonian $H$ has a normal constant of
                 motion $\Lambda$ or a group $G=(g)$ of such constants,
                 and if the subspace $M$ is stable under $\Lambda$ or
                 the group $G=(g)$, then variational solutions $\Phi$
                 show exactly the same type of symmetry properties as
                 the exact eigenfunctions",
  acknowledgement = ack-nhfb,
}

@Article{Lowdin:1972:P,
  author =       "Per-Olov L{\"o}wdin",
  title =        "Preface",
  journal =      j-ADV-QUANTUM-CHEM,
  volume =       "6",
  pages =        "xi--xi",
  year =         "1972",
  CODEN =        "AQCHA9",
  ISSN =         "0065-3276",
  bibdate =      "Wed Dec 27 09:41:16 2000",
  bibsource =    "OCR scan conversion",
  acknowledgement = ack-nhfb,
}

@Article{Lowdin:1972:SCT,
  author =       "P.-O. L{\"o}wdin and P. K. Mukherjee",
  title =        "Some Comments on the Time-Dependent Variation
                 Principle",
  journal =      j-CHEM-PHYS-LETT,
  volume =       "14",
  number =       "1",
  pages =        "1--7",
  year =         "1972",
  CODEN =        "CHPLBC",
  ISSN =         "0009-2614",
  bibdate =      "Sat Dec 16 10:40:43 2000",
  bibsource =    "http://falcon.kvac.uu.se/swe/personal/PerOlovLowdinPub.html;
                 IEEE INSPEC database (1968--2000)",
  abstract =     "The time-dependent variation principle due to Frenkel
                 is discussed from a new standpoint based on the
                 assumption that the norm of the variational function
                 Phi exists. By studying the expectation value of the
                 frequency operator $j=i \delta / \delta t$, one may
                 introduce the conventional normalization and a `phase
                 normalization' through a special gauge transformation
                 leading to the result $J=(H-j)=0$. It is shown that the
                 condition $\delta J=0$ leads to Frenkel's variation
                 principle, which is further discussed by studying the
                 error function $\Theta =(H-i delta / delta t) Phi$.",
  acknowledgement = ack-nhfb,
}

@TechReport{Lowdin:1972:STN,
  author =       "P.-O. L{\"o}wdin",
  title =        "A Stability Theorem For Normal Operators of Importance
                 in Quantum Mechanics",
  type =         "Technical Report",
  number =       "TF 268",
  institution =  inst-QTP,
  address =      inst-QTP:adr,
  day =          "1",
  month =        feb,
  year =         "1972",
  bibdate =      "Thu Nov 16 12:07:42 2000",