L. Steels, and M. Spranger. Artificial Life XI: Proceedings of the Eleventh
International Conference on the Simulation and
Synthesis of Living Systems, page 577--584. MIT Press, Cambridge, MA, (2008)
N. Maisonneuve, M. Stevens, M. Niessen, P. Hanappe, and L. Steels. dg.o '09: Proceedings of the 10th Annual International Conference on Digital Government Research -- Social Networks: Making Connections between Citizens, Data and Government, volume 390 of ACM International Conference Proceeding Series, page 96--103. Digital Government Society of North America / ACM Press, (May 2009)