1. Barkowsky, T., Berendt, B., Egner, S., Freksa, C., Krink, T., Röhrig, R., Wulf, A.: The Realator: how to construct reality. In: Rodríguez, R.V. (ed.) ECAI 1994 Workshop W12 Spatial and Temporal Reasoning, Amsterdam (1994)
2. Bateman, J.A., Hois, J., Ross, R., Tenbrink, T.: A linguistic ontology of space for natural language processing. Artif. Intell. 174, 1027–1071 (2010)
3. Braitenberg, V.: Vehicles: Experiments in Synthetic Psychology. MIT Press, Cambridge (1984)
4. Brooks, R.A.: Intelligence without representation. Artif. Intell. 47, 139–159 (1991)
5. Chandrasekaran, B.: Multimodal cognitive architecture: making perception more central to intelligent behavior. In: Proceedings of AAAI, pp. 1508–1512 (2006)