1. Bard, G.V.: Algebraic Cryptranalysis. Springer (2009)
2. Lecture Notes in Computer Science;C. Berbain,2007
3. Lecture Notes in Computer Science;C. Berbain,2006
4. Bonenberger, D., Krone, M.: Factorization of RSA-170,
http://public.rz.fh-wolfenbuettel.de/~kronema/pdf/rsa170.pdf
5. Chen, M.-S., Chen, T.-R., Cheng, C.-M., Hsiao, C.-H., Niederhagen, R., Yang, B.-Y.: What price a provably secure stream cipher? In: Fast Software Encryption, 2010, Rump session (2010)