1. Ackley, D.K., & Littman, M.L. (1992). Interactions between learning and evolution. In C. Langton, J. Farmer, S. Rasmussen, & C. Taylor (Eds.), Artificial life II. Proceedings volume of Santa Fe conference, Vol. XI. Series of the Santa Fe Institute Studies in the Sciences of Complexities. Redwood City, CA: Addison Wesley.
2. Beer, R. D. (1990). Intelligence as adaptive behaviour: An experiment in computational neuroethology. San Diego, CA: Academic Press.
3. Belew, R.K., & Mitchell, M. (Eds.). (1996). Adaptive individuals in evolving populations: models and algorithms. Redwood City, CA: Addison-Wesley.
4. A robust layered control system for a mobile robot;Brooks;IEEE Robotics and Automation,1986
5. Intelligence without representation;Brooks;Artificial Intelligence,1991