@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}, }