M. Winikoff. Multi-Agent Programming: Languages, Platforms and Applications, volume 15 of Multiagent Systems, Artificial Societies, and Simulated Organizations, chapter 7, Springer, New York, NY, (2005)
P. Gebhard. Proceedings of the Fourth International Joint Conference on Autonomous Agents and Multiagent Systems (AAMAS '05), Utrecht, The Netherlands, page 29--36. New York, ACM, (2005)