Short works
- Evolution as a Theme in Artificial Life: The Genesys/Tracker System. 1992. (In Artificial Life II )
- Evolution of Communication in Artificial Organisms. 1992. (In Artificial Life II )
- Evolution of Herding Behavior in Artificial Animals. 1993. (In From Animals to Animats 2 )
- Toward Synthesizing Artificial Neural Networks that Exhibit Cooperative Intelligent Behavior: Some Open Issues in Artificial Life. 1995. (In Artificial Life: an Overview )