@incollection{EschenbachKulik97,
  author	= {Eschenbach, Carola and Kulik, Lars},
  editor	= {Brewska, G. and Habel, C. and Nebel, B.},
  title		= {An axiomatic approach to the spatial relations underlying \em left-right and \em in front of-behind},
  booktitle	= {KI-97 Advances in Artificial Intelligence},
  pages		= {207--218},
  publisher	= {Springer},
  year		= {1997},
  address	= {Berlin}
}