user- AI Magazine 14(1):17--33 (1993)
- MIT Press, Cambridge, (2000)
- Formal Ontology in Information Systems: proceedings of the third international conference FOIS-2004, volume 114 of Frontiers in Artificial Intelligence and Applications, page 17--34. IOS Press, (2004)
- International Journal of Human-Computer Studies 43(5-6):625--640 (1995)
- AI Magazine 24(3):25--36 (September 2003)
- IV '03: Proceedings of the Seventh International Conference on Information Visualization, Washington, DC, USA, IEEE Computer Society, (2003)
- AI Magazine 24(3):13--24 (September 2003)
- Handbook on Ontologies, Springer, New York, (2004)
- (2002)
- (2002)
- Acta Inf. 38(1):1--44 (September 2001)
- (2005)
- The MIT Press, (April 2004)
- Journal of Information Science 30(4):378--391 (2004)
- Brooks/Cole, (August 2000)
- FOIS 2004, (2004)
- Lund: Lund University Cognitive Studies (1993)
- Journal of the American Society for Information Science and Technology 9999(9999):NA+ (2007)
- Journal of the American Society for Information Science 50(12):1119--1120 (1999)
- (2006)
