Cryptology ePrint Archive: BibTeX Citation of Report 2007/154

@misc{cryptoeprint:2007:154,
    author = {Danilo Gligoroski and Svein Johan Knapskog},
    title = {Edon--${\cal R}(256,384,512)$ -- an Efficient Implementation of Edon--${\cal R}$ Family of Cryptographic Hash Functions},
    howpublished = {Cryptology ePrint Archive, Report 2007/154},
    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.