1. NIST's, Advanced Encryption Standard, home page, available at, http://csrc.nist.gov/encryption/aes/aes_home.htm.
2. Anderson, R, Gibbens, R, Jagger, C, Kelly, F, and, Roe, M. (unpublished), Measuring the diversity of random number generators.
3. Chambers, W. G.1995, On Random Mappings and Random Permutations, Lecture Notes in Computer Science, Vol. 1008, pp. 22–28, Springer-Verlag, Berlin/New York.
4. Clock-controlled shift registers: A review;Gollman;IEEE Selected Areas Comm.,1989
5. Coven, E. M., and Hedlund, G. A.Periods of some nonlinear shift registers, J. Combin. Theory (A)27, 186–197.