@article{DBLP:journals/alife/RasmussenBMNO01,
  author    = {Steen Rasmussen and
               Nils A. Baas and
               Bernd Mayer and
               Martin Nilsson and
               Michael W. Olesen},
  title     = {Ansatz for Dynamical Hierarchies},
  journal   = {Artificial Life},
  volume    = {7},
  number    = {4},
  year      = {2001},
  pages     = {329-353},
  ee        = {http://dx.doi.org/10.1162/106454601317296988},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}