Cryptology ePrint Archive: BibTeX Citation of Report 2009/525

@misc{cryptoeprint:2009:525,
    author = {Somindu C. Ramanna and Palash Sarkar},
    title = {On Quantifying the Resistance of Concrete Hash Functions  to Generic Multi-Collision Attacks},
    howpublished = {Cryptology ePrint Archive, Report 2009/525},
    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.