Cryptology ePrint Archive: BibTeX Citation of Report 2008/026

@misc{cryptoeprint:2008:026,
    author = {Mitsuru Kawazoe and Tetsuya Takahashi},
    title = {Pairing-friendly Hyperelliptic Curves with Ordinary Jacobians of Type $y^2=x^5+ax$},
    howpublished = {Cryptology ePrint Archive, Report 2008/026},
    year = {2008},
    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.