M. Veloso, P. Stone, K. Han, and S. Achim. RoboCup-97: The First Robot World Cup Soccer Games and Conferences, 242-256, Berlin, Springer Verlag, (1998)
T. Haynes, and S. Sen. IJCAI-95 Workshop on Adaptation and Learning in Multiagent Systems, page 32--37. Montreal, Quebec, Canada, Morgan Kaufmann, (20-25 1995)