Cryptology ePrint Archive: BibTeX Citation of Report 2013/074

@misc{cryptoeprint:2013:074,
    author = {Faruk G\"olo\u{g}lu and Robert Granger and Gary McGuire and Jens Zumbr\"agel},
    title = {On the Function Field Sieve and the Impact of Higher Splitting Probabilities: Application to Discrete Logarithms in $\F_{2^{1971}}$ and $\F_{2^{3164}}$},
    howpublished = {Cryptology ePrint Archive, Report 2013/074},
    year = {2013},
    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.