This is an example BibTeX file.
This text is a comment.

@preamble{"%%% example BibTeX file"}

@Preamble{"\newcommand{\noopsort}[1]{} "
        "\newcommand{\noopsort}[1]{} "}

@String{SCI = "Science"}

@STRING{JFernandez = "Fernandez, Julio M."}
@StRiNg{HGaub = "Gaub, Hermann E."}
@string{MGautel = "Gautel, Mathias"}
@String{FOesterhelt = "Oesterhelt, Filipp"}
@String{MRief = "Rief, Matthias"}

@Article{rief97b,
       author =       MRief #" and "# MGautel #" and "# FOesterhelt
                          #" and "# JFernandez #" and "# HGaub,
       title =        "Reversible Unfolding of Individual Titin
                          Immunoglobulin Domains by {AFM}",
       journal =      SCI,
       volume =       276,
       number =       5315,
       pages =        "1109--1112",
       year =         1997,
       doi =          "10.1126/science.276.5315.1109",
       URL =          "http://www.sciencemag.org/cgi/content/abstract/276/5315/1109",
       eprint =       "http://www.sciencemag.org/cgi/reprint/276/5315/1109.pdf",
}


Parens can be used instead of braces:

@ARTICLE(ruckenstein-diffusion,
    author = "Liu, Hongquin and Ruckenstein, Eli",
    language = "english",
    title = "Predicting the Diffusion Coefficient in Supercritical Fluids",
    journal = "Ind. Eng. Chem. Res.",
    volume = "36",
    year = "1997",
    pages = "888-895"
)

@book{
    viktorov-methods,
    author = "Викторов, Михаил Маркович",
    publisher = "Л.: <<Химия>>",
    title = "Методы вычисления физико-химических величин и прикладные расчёты",
    language = "russian",
    year = "1977",
    isbn = "000-0000000000",
}

@comment{jackson-commented-out,
    author = "Jackson, P\'eter",
    publisher = "Some Publisher",
    language = "english",
    title = "Some Title",
    series = "Some series",
    booktitle = "Commented Out",
    number = "3",
    edition = "Second",
    year = "1933",
    pages = "44--59"
}

@booklet{test-booklet,
    author = "de Last, Jr., First Middle",
    language = "english",
    title = "Just a booklet",
    year = 2006,
    month = jan,
    address = "Moscow",
    howpublished = "Published by Foo"
}