Jérôme Lang, Leendert van der Torre, Emil Weydert (2002): Autonomous Agents and Multi-Agent Systems. Autonomous Agents and Multi-Agent Systems, Volume 5, Issue 3, pp 329-363.
Guido Boella, Leendert van der Torre, Harko Verhagen (2006): Introduction to normative multiagent systems. Computational & Mathematical Organization Theory. Volume 12, Issue 2, pp 71-79.
Jérôme Lang, Leendert van der Torre, Emil Weydert (2002): Autonomous Agents and Multi-Agent Systems. Autonomous Agents and Multi-Agent Systems, Volume 5, Issue 3, pp 329-363.