with : Leon Van der Torre

9th International Workshop “Engineering Societies in the Agents World” (ESAW 2008) — 24/09/2008–26/09/2008

Engineering Societies in the Agents' World VIII (ESAW 2007) — 22/10/2007–24/10/2007

7th International Workshop “Engineering Societies in the Agents World VII” (ESAW 2006) — 06/09/2006–08/09/2006

6th International Workshop “Engineering Societies in the Agents World VI” (ESAW 2005) — 26/10/2005–28/10/2005