Cryptology ePrint Archive: BibTeX Citation of Report 2009/005

@misc{cryptoeprint:2009:005,
    author = {Wei Wang and Xiaoyun Wang and Guangwu Xu},
    title = {Impossible Differential Cryptanalysis of Pelican, MT-MAC-AES and PC-MAC-AES},
    howpublished = {Cryptology ePrint Archive, Report 2009/005},
    year = {2009},
    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.