1. Alan, Y.: Konstruktion der KOWIEN-Ontologie. Projektbericht 2/2003, Institut für Produktion und Industrielles Informationsmanagement, Universität Duisburg-Essen, www.kowien.uni-essen.de/publikationen/konstruktion.pdf, 2003, Download 2004-06-25.
2. Beckett, D.: Scalability and Storage: Survey of Free Software / Open Source RDF storage systems. http://www.w3.org/2001/sw/Europe/reports/rdf_scalable_storage_report/, 2003, Download 2004-06-20.
3. Berners-Lee, T.; Hendler, J.; Lassila, O.: The Semantic Web. A new form of Web content that is meaningful to computers will unleash a revolution of new possibilities. http://www.scientificamerican.com/, 2001, Download 2004-06-25.
4. Billig, A.; Sandkuhl, K.: Match-Making based on Semantic Nets: The XML-based approach of BaSeWeb. In: Tolksdorf, R., Eckstein, R. (Edt.): Proceedings of the 1st workshop on XML-Technologien für das Semantic Web, 2002, pp. 39–51.
5. Bizer, C.: D2R MAP — A Database to RDF Mapping Language. In: Proceedings of the 12th International World Wide Web Conference, 2003.