1999, Article in monograph or in proceedings (ICANN 99 : Ninth International Conference on Artificial Neural Networks, University of Edinburgh, 7-10 september, 1999, pp. 425-431)
2000, Part of book or chapter of book (Ritter, H.; Cruse, H.; Dean, J. (ed.), Prerational Intelligence: Adaptive Behavior and Intelligent Systems Without Symbols and Logic, pp. 157-164)