J. Broekstra, и A. Kampman.. Workshop on Practical and Scalable Semantic Systems (PSSS) at the Second International Semantic Web Conference (ISWC), Sanibel Island, Florida,, (октября 2003)
D. Fensel, S. Decker, M. Erdmann, и R. Studer. Proceedings of the 11th International Flairs Conference (FLAIRS-98), Sanibel Island, Florida, (мая 1998)