Cryptology ePrint Archive: BibTeX Citation of Report 2002/181

@misc{cryptoeprint:2002:181,
    author = {Eisaku Furukawa and Mitsuru Kawazoe and Tetsuya Takahashi},
    title = {Counting Points for Hyperelliptic Curves of type $y^2=x^5+ax$ over Finite Prime Fields},
    howpublished = {Cryptology ePrint Archive, Report 2002/181},
    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.