X. Peng, E. Goodman, и R. Rosenberg. Genetic Programming Theory and Practice IV, том 5 из Genetic and Evolutionary Computation, глава 5, Springer, Ann Arbor, (11-13 May 2006)
J. Hu, X. Zhong, и E. Goodman. GECCO 2005: Proceedings of the 2005 conference on
Genetic and evolutionary computation, 2, стр. 1619--1626. Washington DC, USA, ACM Press, (25-29 June 2005)