@misc{cryptoeprint:2003:169,
    author = {Boris Pogorelov and Marina Pudovkina },
    title = {Properties of the Transformation Semigroup of the Solitaire Stream Cipher  },
    howpublished = {Cryptology ePrint Archive, Report 2003/169},
    year = {2003},
    url = {http://eprint.iacr.org/2003/169},
}