In: Proceedings of the 4th International Symposium on Artificial Intelligence. International Symposium on Artificial Intelligence (ISAI), 4th, November 13-15, Cancún, Mexico, Pages 314-320, AI Magazine, Vol. 13, No. 2, AAAI, 11/1991.
In: IV International Symposium on Artificial Intelligence: Applications in Informatics and International Conference on Manufacturing Automation. International Conference on Manufacturing Automation (ICMA), 1991.
In: Yves Demazeau; Jean-Pierre Müller (Hrsg.). Decentralized AI2 - Proceedings of 2nd European Workshop on Modelling Autonomous Agents in a Multi Agent World. European Workshop on Modelling Autonomous Agents in Multi Agent Worlds (MAAMAW-90), 2nd, Pages 217-230, Elsevier Science Publishers, 1991.