@misc{cryptoeprint:2006:429,
    author = {Sugata Gangopadhyay and Deepmala Sharma},
    title = {On a new invariant of Boolean functions},
    howpublished = {Cryptology ePrint Archive, Report 2006/429},
    year = {2006},
    url = {http://eprint.iacr.org/2006/429},
}