S. Bechofer, F. Van-harmelen, J. Hendler, I. Horrocks, D. L. Mcguinness et al., OWL Web Ontology Language Reference Editor's Draft document ? no status at this time, 2003.

D. L. Mcguinness, Frank van Harmelen (Vrije Universiteit, Amsterdam), OWL Web Ontology Language, Overview, W3C Working Draft, 2003.