1. Weiser, M.: The computer for the 21st century. SIGMOBILE Mob. Comput. Commun. Rev. 3(3), 3–11 (1999)
2. Jones, D., Bench-Capon, T., Visser, P.: Methodologies for ontology development. In: Proceedings of the IT&KNOWS Conference, XV IFIP World Computer Congress (1998)
3. Foundations. In: Grimm, S., Volz, R. (eds.) Semantics At Work, Ontology Management Tools and Techniques (June 2007)
4. Liu, L., Özsu, M.T. (eds.): Encyclopedia of Database Systems. Springer, New York (2009)
5. OWL Web Ontology Language overview, W3C recommendation (2004),
http://www.w3.org/TR/owl-features/