- The VLDB Journal (2010)
- Proceedings of the 19th International World Wide Web Conference WWW 2010, Raleigh, NC, USA, ACM, (April 2010)
- Proceedings of the 21st ACM conference on Hypertext and hypermedia, Toronto, Canada, (2010)
- Proceedings of the Workshop on Mining Ubiquitous and Social Environments MUSE2010, Barcelona, Spain, (2010)
- Informatik-Spektrum (2010)
- The VLDB Journal (2010)
- MultiMedia und Recht (2010)
- Workshop on Knowledge Discovery, Data Mining, and Machine Learning, page 44 --51. (September 2009)
- HT '09: Proceedings of the 20th ACM Conference on Hypertext and Hypermedia, page 323--324. New York, NY, USA, ACM, (June 2009)
- Informatik 2006 -- Informatik für Menschen. Band 2, volume P-94 of Lecture Notes in Informatics, Bonn, Gesellschaft für Informatik, (October 2006)Proc. Workshop on Applications of Semantic Technologies, Informatik 2006 .
- Social Software in der Wertschöpfung, Baden-Baden, Nomos, (2006)
- Journal of Web Semantics 6(1):38-53 (2008)
- Proc. of the ICCS 2006 Conceptual Structures Tool Interoperability Workshop, (2006)to appear .
- (2007)
- (2007)Deliverable 15.2, European Network of Excellence ``Prolearn - Professional E-Learning'' .
- Proceedings of the 15th International Conference on Conceptual Structures ICCS 2007, volume 4604 of Lecture Notes in Artificial Intelligence, page 283--295. Berlin, Heidelberg, Springer-Verlag, (July 2007)
- Workshop on Social and Collaborative Construction of Structured Knowledge CKC 2007 at WWW 2007, Banff, Canada, (2007)


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