R. Poli, und N. McPhee. Genetic Programming, Proceedings of EuroGP'2001, Volume 2038 von LNCS, Seite 126--142. Lake Como, Italy, Springer-Verlag, (18-20 April 2001)
M. Miki, M. Hashimoto, und Y. Fujita. GECCO '07: Proceedings of the 9th annual conference on
Genetic and evolutionary computation, 2, Seite 1754--1754. London, ACM Press, (7-11 July 2007)