1. Maintaining knowledge about temporal intervals;Allen;Communications of the ACM,1983
2. Modelling spatial relations and operations with partially ordered sets;Kainz;International Journal of Geographical Information Systems,1993
3. J.F. Roddick, K. Hornsby, D. de Vries, A unifying semantic distance model for determining the similarity of attribute values, in: M. Oudshoorn (Ed.), 26th Australasian Computer Science Conference (ACSC2003), vol. 16, ACS, Adelaide, Australia, 2003, pp. 111–118.
4. Z. Kedad, E. Métais, Dealing with semantic heterogeneity during data integration. in: J. Akoka, B. Mokrane, I. Comyn-Wattiau, E. Métais (Eds.), 18th International Conference on Conceptual Modelling, Vol. 1728 of Lecture Notes in Computer Science, Springer, Paris France, 1999, pp. 325–339.
5. WordNet: An Electronic Lexical Database,1998