Cryptology ePrint Archive: BibTeX Citation of Report 1997/004

@misc{cryptoeprint:1997:004,
    author = {Mihir Bellare},
    title = {A note on negligible functions},
    howpublished = {Cryptology ePrint Archive, Report 1997/004},
    year = {1997},
    note = {\url{http://eprint.iacr.org/}},
}

You will need the url.sty package (comes with most LaTeX installations) for the last line. Otherwise, remove the \url command.