A. Almal, W. Worzel, E. Wollesen, и C. MacLean. Genetic Programming Theory and Practice III, том 9 из Genetic Programming, глава 12, Springer, Ann Arbor, (12-14 May 2005)
E. Burke, S. Gustafson, и G. Kendall. GECCO 2002: Proceedings of the Genetic and
Evolutionary Computation Conference, стр. 716--723. New York, Morgan Kaufmann Publishers, (9-13 July 2002)