@misc{cryptoeprint:2005:299,
    author = {Marcin Kontak and Janusz Szmidt},
    title = {Nonlinearity of the Round Function},
    howpublished = {Cryptology ePrint Archive, Report 2005/299},
    year = {2005},
    url = {http://eprint.iacr.org/2005/299},
}