1. Billen, R., Zlatanova, S., Mathonet, P., & Boniver, F. (2002). The Dimensional Model: a framework to distinguish spatial relationships. In: D. Richardson, & P. van Oosterom (Eds.) Advances in Spatial Data Handling, (pp 285–298). Berlin: Springer-Verlag.
2. Clementini, E., di Felice, P., & van Oosterom, P. (1993). A small set of formal topological relations suitable for end-user interaction. In Proceedings of the 3th International Symposium on large spatial databases (pp. 277–295). Berlin: Springer-Verlag.
3. Danahy, J. (1997). A set of visualisation data needs in urban environmental planning&design for photogrammetric data. In Proceedings of the Ascona Workshop '97: automatic extraction of man-made objects from aerial and space images (pp. 357–365), Monte Verita, Switzerland.
4. Egenhofer, M. J., Frank, A. U., & Jackson, J. P. (1989). A topological data model for spatial databases. NCGIA Technical report, No. 104.
5. Egenhofer, M. J., & Herring, J. R. (1990). A mathematical framework for the definition of topological relationships. In Proceedings of Fourth International Symposium on SDH (pp. 803–813), Zurich, Switzerland.