1. Knuth, D.E.: The art of computer programming. In: Seminumerical Algorithms, 3rd edn., vol. 2, Addison-Wesley/Longman Publishing Co., Inc. (1997)
2. Marsaglia, G., Tsang, W.W.: Some Difficult-to-pass Tests of Randomness. Journal of Statistical Software 7(i03)
3. Markovski, S.: Quasigroup String Processing and Applications in Cryptography. In: Proceedings 1st Conference of Mathematics and Informatics for Industry, Thessaloniki, Greece, pp. 278–290 (2003)
4. Dimitrova, V., Markovski, J.: On quasigroup pseudo random sequence generator. In: Manolopoulos, Y., Spirakis, P. (eds.) Proc. of the 1-st Balkan Conference in Informatics, Thessaloniki, November 2004, pp. 393–401 (2004)
5. Bäck, T., Hammel, U., Schwefel, H.-P.: Evolutionary computation: comments on the history and current state. IEEE Transactions on Evolutionary Computation 1, 3–17 (1997)