1. Allen, J.F.: Maintaining knowledge about temporal intervals. Communications of the ACM 26(11), 832–843 (1983)
2. Bailey-Kellogg, C., Zhao, F.: Qualitative spatial reasoning - extracting and reasoning with spatial aggregates. AI Magazine 24(4), 47–60 (2003)
3. Barwise, J., Perry, J.: Situations and Attitudes. MIT Press, Cambridge (1983)
4. Lecture Notes in Computer Science;N. Baumgartner,2009
5. Baumgartner, N., Gottesheim, W., Mitsch, S., Retschitzegger, W., Schwinger, W.: “Same, Same but Different”—A Survey on Duplicate Detection Methods for Situation Awareness. In: Proceedings of the 8th International Conference on Ontologies, DataBases and Applications of Semantics, Vilamoura, Portugal. Springer, Heidelberg (2009)