M. Butz, and S. Wilson. IWLCS '00: Revised Papers from the Third International Workshop on Advances in Learning Classifier Systems, page 253--272. London, UK, Springer-Verlag, (2001)
N. Fredivianus, and K. Geihs. Proceedings of the Genetic and Evolutionary Computation Conference Companion, page 1341--1348. New York, NY, USA, ACM, (2017)
S. Wilson. Genetic Programming 1998: Proceedings of the Third Annual Conference, page 665--674. University of Wisconsin, Madison, Wisconsin, USA, Morgan Kaufmann, (22-25 1998)