Short works
- Mirror Beyond Mirror: Puddles of Life. 1989. (In Artificial Life )
- Evolution as Pattern Processing: TODO as Substrate for Evolution. 1991. (In From Animals to Animats )
- Self-Structuring and Selection: Spiral Waves as a Substrate for Prebiotic Evolution. 1992. (In Artificial Life II )
- Randomness and Pattern Scale in the Immune Network: A Cellular Automata Approach. 1993. (In Thinking About Biology )
- Effects of Tree Size on Travelband Formation in Orang-Utans: Data Analysis Suggested by a Model Study. 1994. (In Artificial Life IV )
- On Searching for Generic Properties of Non-Generic Phenomena: An Approach to Bioinformatic Theory Formation. 1998. (In Artificial Life VI )
- Evolution to Complexity: Replication, Elongation and Assembly in an RNA World. 1999. (In Advances in Artificial Life, ECAL'99 )
- Computing an organism: on the interface between informatic and dynamic processes. 2003. (In On Growth, Form and Computers )