1. The ECRYPT Stream Cipher Project. eSTREAM Portfolio of Stream Ciphers (revised on September 8, 2008)
2. Erdős, P., Rényi, A.: On a classical problem of probability theory. Magyar Tudományos Akadémia Matematikai Kutató Intézetének Közleményei 6, 215–220, MR 0150807 (1961),
http://www.renyi.hu/~p_erdos/1961-09.pdf
3. Cid, C., Robshaw, M. (eds.), S. Babbage, J. Borghoff and V. Velichkov (Contributors). The eSTREAM Portfolio in 2012, Version 1.0 (January 16, 2012),
http://www.ecrypt.eu.org/documents/D.SYM.10-v1.pdf
4. Babbage, S., Dodd, M.: The stream cipher MICKEY 2.0. ECRYPT Stream Cipher Project Report,
http://www.ecrypt.eu.org/stream/p3ciphers/mickey/mickey_p3.pdf
5. Babbage, S., Dodd, M.: The stream cipher MICKEY-128 2.0. ECRYPT Stream Cipher Project Report,
http://www.ecrypt.eu.org/stream/p3ciphers/mickey/mickey128_p3.pdf