Cryptology ePrint Archive: BibTeX Citation of Report 2015/885

@misc{cryptoeprint:2015:885,
    author = {Roman Oliynykov and Ivan Gorbenko and Oleksandr Kazymyrov and Victor Ruzhentsev and Oleksandr Kuznetsov and Yurii Gorbenko and Artem Boiko and Oleksandr Dyrda and Viktor Dolgov and Andrii Pushkaryov},
    title = {A New Standard of Ukraine: The Kupyna Hash Function},
    howpublished = {Cryptology ePrint Archive, Report 2015/885},
    year = {2015},
    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.