1. Bouguettaya, A., Benatallah, B., Elmagarmid, A.K.: Multidatabase Systems: Past and Present. In: Elmagarmid, A.K., Rusinkiewicz, M., Sheth, A. (eds.) Distributed and Heterogeneous Database Systems, Morgan Kauffmann, San Francisco (1998)
2. Fankhauser, P., Gardarin, G., Lopez, M., Muñoz, J., Tomasic, A.: Experiences in Federated Data-bases From IRO-DB to MIRO-Web. In: 24th VLDB 1998, New-York, USA, pp. 655–658 (1998)
3. Wache, H., Vogele, T., Visser, U., Stuckenschmidt, H., Schuster, G., Neumann, H., Hubner, S.: Ontology-Based Integration - a survey of Existing Approaches. In: IJCAI 2001 Workshop: Ontologies and Information Sharing, pp. 108–117 (2001)
4. Sheth, A.: Changing Focus on Interoperability in Information Systems: from System, Syntax, Structure to Semantics. In: Interoperating Geographic Information Systems, Kluwer Academic Publishers, Boston, MA (1999)
5. Kahng, J., Mac Leod, D.: Dynamic Classificational Ontologies. In: Arbid, M.A., Grethe, J. (eds.) Computing the Brain : A Guide to Neuroinformatics, Academic Press, San Diego (2000)