Cryptology ePrint Archive: BibTeX Citation of Report 2011/105

@misc{cryptoeprint:2011:105,
    author = {S. Erickson and M. J. Jacobson, Jr. and A. Stein},
    title = {Explicit Formulas for Real Hyperelliptic Curves of Genus 2 in Affine Representation},
    howpublished = {Cryptology ePrint Archive, Report 2011/105},
    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.