- volume 124 of CEUR Workshop Proceedings, Aachen, (2004)
- volume 51 of LNI, Bonn, Gesellschaft für Informatik, (2004)
- Data Mining Next Generation Challenges and Future Directions, AAAI Press, Boston, (2004)
- Conceptual Structures at Work: 12th International Conference on Conceptual Structures ICCS 2004, volume 3127 of LNCS, page 109-125. Heidelberg, Springer, (2004)
- Web Mining: From Web to Semantic Web, 3209, page 1-22. Heidelberg, Springer, (2004)
- volume 3209 of LNAI, Heidelberg, Springer, (2004)http://km.aifb.uni-karlsruhe.de/ws/ewmf03/ .
- Concept Lattices, volume 2961 of LNAI, page 189-207. Heidelberg, Second International Conference on Formal Concept Analysis, ICFCA 2004, Springer, (2004)
- Proc. 13th International World Wide Web Conference WWW 2004, page 1-10. (2004)


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