Cryptology ePrint Archive: BibTeX Citation of Report 2007/024

@misc{cryptoeprint:2007:024,
    author = {Gregory V. Bard, and Nicolas T. Courtois, and Chris Jefferson.},
    title = {Efficient Methods for Conversion and Solution of Sparse Systems of Low-Degree Multivariate Polynomials over GF(2) via SAT-Solvers},
    howpublished = {Cryptology ePrint Archive, Report 2007/024},
    year = {2007},
    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.