M. Weijnen, P. Herder, und I. Bouwmans. Delft Science in Design 2, A Congress on Interdisciplinary Design, Volume 3 von Research in Design Series, IOS Press, (2008)
F. Sempé, M. Nguyen-Duc, A. Boucher, und A. Drogoul. AAMAS'05: Proc. 4th Int'l Jt. Conf. on
Autonomous Agents and Multiagent Systems, Seite 1361--1362. Utrecht, Netherlands, ACM Press, (2005)