user- Proceedings of the symposium on Data Visualisation 2002, page 159--ff. Aire-la-Ville, Switzerland, Switzerland, Eurographics Association, (2002)
- (2009)cite arxiv:0906.2212 .
- Proc. 2008 Int. Conf. on Data Mining ICDM'08, Pisa, Italy, Dec. 2008., (December 2008)
- (2008)
- Proceedings of the 3rd European Semantic Web Conference, page 411-426. Springer, (2006)
- Conceptual Structures: Fulfilling Peirce's Dream, volume 1257 of Lecture Notes in Artificial Intelligence, page 290--303. Heidelberg, Springer, (1997)
- ICCS, volume 1640 of Lecture Notes in Computer Science, page 401-414. Springer, (1999)
- Graph Drawing, volume 894 of LNCS, page 452-459. Heidelberg, Springer, (1995)
- Conceptual Structures: Logical, Linguistic, and Computational, volume 1867 of LNAI, page 453-467. Heidelberg, Springer, (2000)
- The Semantic Web: Research and Applications, volume 4011 of LNAI, page 530-544. Heidelberg, Springer, (2006)
