@InProceedings{trianni03,
  author =       {V.~Trianni and R.~Gro{\ss} and T.H.~Labella and E.~{\c{S}ahin} and M.~Dorigo},
  title =        {{Evolving Aggregation Behaviors in a Swarm of Robots}},
  booktitle =    {Advances in Artificial Life - Proceedings of the 7th European Conference on Artificial Life (ECAL)},
  pages =        {865-874},
  year =         2003,
  editor =       {W. Banzhaf and T. Christaller and P. Dittrich and J. T. Kim and J. Ziegler},
  volume =       2801,
  series =       {Lecture Notes in Artificial Intelligence},
  publisher =    {Springer Verlag, Heidelberg, Germany},
}