with : Heikki Helin

8th International Workshop on Cooperative Information Agents (CIA 2004) — 27/08/2004–29/08/2004

7th International Workshop on Cooperative Information Agents (CIA 2003) — 27/08/2003–29/08/2003

1st International Conference on Autonomous Agents and Multiagent Systems (AAMAS 2002) — 15/07/2002–19/07/2002