T. White, und F. Oppacher. Proceedings of the 3rd Conference on Parallel Problem Solving from Nature, 866, Seite 229--238. Springer, Berlin, Heidelberg, New York, (1994)
G. Oliveira, P. de Oliveira, und N. Omar. Proceedings of the Genetic and Evolutionary
Computation Conference (GECCO-2001), Seite 181. San Francisco, California, USA, Morgan Kaufmann, (7-11 July 2001)
K. Sims. Toward a Practice of Autonomous Systems: Proceedings
of the First European Conference on Artificial Life, Seite 171--178. Paris, France, MIT Press, (11-13 December 1992)