G. Engelen, R. White, I. Uljee, and P. Drazan, Using Cellular Automata for Integrated Modelling of Socio-environmental Systems, Environmental monitoring and Assessment, volume 30, p.203-214 G. Engelen, Complex Urban Areas and their Sustainable Development, Proceedings of the Urban Utopias conference, Berlin, November 15-17, 1995, p.737-773 Berlin, Germany