with : Jürgen Lind

4th European Workshop on Multi-Agent Systems (EUMAS 2006) — 14/12/2006–15/12/2006

2nd European Workshop on Multi-Agent Systems (EUMAS 2004) — 16/12/2004–17/12/2004

3rd International Conference on Autonomous Agents and Multiagent Systems (AAMAS 2004) — 19/07/2004–23/07/2004