N. Maisonneuve, M. Stevens, M. Niessen, P. Hanappe, und 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 von ACM International Conference Proceeding Series, Seite 96--103. Digital Government Society of North America / ACM Press, (Mai 2009)