Cryptology ePrint Archive: BibTeX Citation of Report 2012/073

@misc{cryptoeprint:2012:073,
    author = {Wei Gao, Guilin Wang, Xueli Wang, Kefei Chen},
    title = {Efficient identity-based threshold signature  scheme from bilinear pairings in the standard model},
    howpublished = {Cryptology ePrint Archive, Report 2012/073},
    year = {2012},
    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.