@InProceedings{ balnolpar02,
  author = 	 {Baldassarre, G. and Nolfi, S. and Parisi, D.},
  title = 	 {Evolving Mobile Robots Able to Display Collective Behaviours},
  booktitle = 	 {Proceedings of the International Workshop on Self-Organisation and Evolution of Social Behaviour},
  pages = 	 {11-22},
  year = 	 {2002},
  editor = 	 {Hemelrijk, C.K. and Bonabeau, E.},
  address = 	 {Monte Verit\`a, Ascona, Switzerland},
  month = 	 sep # "~8-13,",
  publisher = {University of Zurich},
}