Cryptology ePrint Archive: BibTeX Citation of Report 2012/534

@misc{cryptoeprint:2012:534,
    author = {Maura B. Paterson and Douglas R. Stinson},
    title = {A Simple Combinatorial Treatment of Constructions and Threshold Gaps of Ramp Schemes},
    howpublished = {Cryptology ePrint Archive, Report 2012/534},
    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.