@inproceedings{toennis2007ontology,
  author    = {T{\"o}nnis, Marcus and Fischer, Jan-Gregor and Klinker, Gudrun},
  title     = {{Ontology-based Pervasive Spatial Knowledge for Car Driver Assistance}},
  booktitle = {{Proceedings of the 5th annual IEEE International Conference on Pervasive Computing and Communications (PerCom)}},
  address = {{White Plains, NY}},
  year      = 2007
}