1. Das, A., Wu, W., McGuinness, D.: Industrial Strength Ontology Management. In: The Emerging Semantic Web, IOS Press, Amsterdam
2. May, W., Alferes, J., Fry, B.: Towards Generic Query, Update, and Event Languages for the Semantic Web. In: Proc. 2nd PPSWR (2004)
3. Perez, A.G.: A Survey on Ontology Tools. Deliverable 1.3 IST Project OntoWeb (2002)
4. Magkanaraki, A., Karvounarakis, G., Christophides, V., Plexousakis, D., Anh, T.: Ontology Storage and Querying. ICS-FORTH Technical Report 308 (2002)
5. Lecture Notes in Computer Science;A. Seaborne,2002