Cryptology ePrint Archive: BibTeX Citation of Report 2005/359

@misc{cryptoeprint:2005:359,
    author = {L. Budaghyan and  C. Carlet and P. Felke and G. Leander},
    title = {An infinite class of quadratic APN functions which are not equivalent to power mappings},
    howpublished = {Cryptology ePrint Archive, Report 2005/359},
    year = {2005},
    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.