Cryptology ePrint Archive: BibTeX Citation of Report 2012/245

@misc{cryptoeprint:2012:245,
    author = {Qiang Li and Xiangxue Li and Dong Zheng and Zheng Huang and Kefei Chen},
    title = {On the Equivalence between the Set Covering Problem and the Problem of Finding Optimal Cumulative Assignment Schemes},
    howpublished = {Cryptology ePrint Archive, Report 2012/245},
    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.