Cryptology ePrint Archive: BibTeX Citation of Report 2010/436

@misc{cryptoeprint:2010:436,
    author = {Roberto Avanzi and Clemens Heuberger and Helmut Prodinger},
    title = {Arithmetic of Supersingular Koblitz Curves in Characteristic Three},
    howpublished = {Cryptology ePrint Archive, Report 2010/436},
    year = {2010},
    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.