@misc{cryptoeprint:2004:248,
    author = {An Braeken and Yuri Borissov and Svetla Nikova and Bart Preneel},
    title = {Classification of Boolean Functions of 6 Variables or Less with Respect to Cryptographic Properties},
    howpublished = {Cryptology ePrint Archive, Report 2004/248},
    year = {2004},
    url = {http://eprint.iacr.org/2004/248},
}