1. T. Catarci, T. Di Mascio, E. Franconi, G. Santucci, S. Tessaris, An ontology based visual tool for query formulation support, in: On the Move to Meaningful Internet Systems 2003: OTM 2003 Workshops, Springer, Berlin/Heidelberg, 2003, pp. 32–33.
2. E. Kapetanios, D. Baer, B. Glaus, P. Groenewoud, Data querying and analysis through integration of intentional and extensional semantics, in: Anon. (Ed.), 16th International Conference on Scientific and Statistical Database Management (SSDBM), 2004, pp. 353–356.
3. Description Logics as Ontology Languages for the Semantic Web;Baader,2005
4. A translation approach to portable ontology specifications;Gruber;Knowl. Acquis.,1993
5. Description Logic Handbook – Theory;Baader,2003