@incollection{DerMartius13,
  title = {Behavior as broken symmetry in embodied self-organizing robots},
  booktitle = {Advances in Artificial Life, ECAL 2013},
  pages = {601-608},
  publisher = {MIT Press},
  year = {2013},
  slug = {dermartius13},
  author = {Der, Ralf and Martius, Georg}
}