Cryptology ePrint Archive: BibTeX Citation of Report 2011/468

@misc{cryptoeprint:2011:468,
    author = {Hongfeng Wu and Chang-An Zhao},
    title = {Faster Scalar Multiplication on Ordinary Weierstrass Elliptic Curves over Fields of Characteristic Three},
    howpublished = {Cryptology ePrint Archive, Report 2011/468},
    year = {2011},
    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.