J. Butts, and G. Sohi. MICRO 33: Proceedings of the 33rd annual ACM/IEEE international symposium on Microarchitecture, page 191--201. New York, NY, USA, ACM Press, (2000)
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)
G. Venturini. Proceedings of the Third International Conference on Simulation of Adaptive Behavior: from animals to animats 3 (SAB94), page 371--379. Cambridge, MA, USA, MIT Press, (1994)