[KMR04]   Holger Knublauch, Mark A. Musen, and Alan L. Rector. Editing description logic ontologies with the protégé owl plugin. In Description Logics, 2004.

[KPS⁺ 05]   Aditya Kalyanpur, Bijan Parsia, Evren Sirin, Bernardo C. Grau, and James Hendler. Swoop: A web ontology editing browser. Web Semantics: Science, Services and Agents on the World Wide Web, 4(2):144–153, June 2005.

[LBF⁺ 06]   C. Lutz, F. Baader, E. Franconi, D. Lembo, R. Möller, R. Rosati, U. Sattler, B. Suntisrivaraporn, and S. Tessaris. Reasoning Support for Ontology Design. In B. Cuenca Grau, P. Hitzler, C. Shankey, and E. Wallace, editors, In Proceedings of the second international workshop OWL: Experiences and Directions, November 2006. To appear.

[LN05]   Thorsten Liebig and Olaf Noppens. OntoTrack: A semantic approach for ontology authoring. Journal of Web Semantics, 3(2-3):116–131, October 2005.

[LN06]   Thorsten Liebig and Olaf Noppens. Interactive Visualization of Large OWL Instance Sets. In Proc. of the Third Int. Semantic Web User Interaction Workshop (SWUI 2006), Athens, GA, USA, November 2006.

[Ope]   OpenCyc. http://www.opencyc.org/.

[SK06]   Ferdinando Villa Sergey Krivov, Rich Williams. Growl, visual browser and editor for owl ontologies. Journal of Web Semantics, 2006.