R. Aler, D. Borrajo, und P. Isasi. Proceedings of the 2001 Congress on Evolutionary
Computation CEC2001, Seite 1220--1227. COEX, World Trade Center, 159 Samseong-dong,
Gangnam-gu, Seoul, Korea, IEEE Press, (27-30 May 2001)
R. Schank, und R. Abelson. Thinking: Readings in Cognitive Science, Proceedings of the Fourth International Joint Conference on Artificial Intelligence, Seite 151-157. Tbilisi, USSR, (1975)