L. Acker, and B. Porter. Proceedings of the 12th National Conference on Artificial Intelligence, page 547--552. San Francisco, CA: Morgan Kaufmann, (1994)
D. Ackley, and M. Littmann. Proceedings of the Fourth International Workshop on the Synthesis and Simulation of Living Systems (Artificial Life IV), Cambridge, MA: MIT Press, (1994)
J. Anderson. Proceedings of the Seventh International Joint Conference on Artificial Intelligence, page 97--103. San Francisco, CA: Morgan Kaufmann, (1981)
P. Angeline, and J. Pollack. Proceedings of the Fifth International Conference on Genetic Algorithms, page 264--270. San Francisco, CA: Morgan Kaufmann, (1993)
J. Barhen, and S. Gulati. Proceedings of the International Joint Conference on Neural Networks (Washington, DC), I, page 619--626. Piscataway, NJ: IEEE, (1989)