Cryptology ePrint Archive: BibTeX Citation of Report 2002/112

@misc{cryptoeprint:2002:112,
    author = {Kirsten Eisentraeger, Kristin Lauter, and Peter L. Montgomery},
    title = {An Efficient Procedure to Double and Add Points on an Elliptic Curve},
    howpublished = {Cryptology ePrint Archive, Report 2002/112},
    year = {2002},
    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.