@InProceedings{baldassarre03:_evolut,
  author = 	 {Baldassarre, G. and Nolfi, S. and Parisi D.},
  title = 	 {Evolution of collective behaviour in a team of physically linked robots},
  booktitle = 	 {Applications of Evolutionary Computing},
  pages =	 {581--592},
  year =	 2003,
  editor =	 {Gunther, R. and Guillot, A. and Meyer, J.-A.},
  publisher =	 {Springer Verlag, Heidelberg, Germany}
}