- Datenbank-Spektrum 10(1):15--24 (June 2010)
- WSDM Late Breaking-Results, ACM, (2009)
- 18th International World Wide Web Conference, page 641--650. (April 2009)
- Workshop Proceedings of Lernen -- Wissensentdeckung -- Adaptivität LWA 2007, page 50-54. Martin-Luther-Universität Halle-Wittenberg, (September 2007)
- AI Communications Journal, Special Issue on ``Network Analysis in Natural Sciences and Engineering'' 20(4):245-262 (2007)
- Proceedings of the Second International Conference on Weblogs and Social MediaICWSM 2008, AAAI Press, (2008)
- Proceedings of the 6th IEEE International Conference on Data Mining ICDM 06, page 907-911. Hong Kong, IEEE Computer Society, (December 2006)
- Proc. of the Fourth International Workshop on Adversarial Information Retrieval on the Web, (2008)
- Advances in Information Retrieval, 30th European Conference on IR Research, ECIR 2008, volume 4956 of LNAI, page 101-113. Heidelberg, Springer, (2008)
- Social Software in der Wertschöpfung, Baden-Baden, Nomos, (2006)
- Proceedings of the 3rd Workshop on Ontology Learning and Population OLP3, Patras, Greece, (July 2008)
- Information Wissenschaft und Praxis 59(2):100-107 (2008)
- Journal of Web Semantics 6(1):38-53 (2008)
- ISWC 2005, volume 3729 of LNCS, page 522-536. Springer-Verlag, (November 2005)
- CSCW '06: Proceedings of the 2006 20th anniversary conference on Computer supported cooperative work, page 181--190. New York, NY, USA, ACM, (2006)
- 7th International Conference on Knowledge Management I-KNOW '07, page 356-364. Graz, Austria, Know-Center, (September 2007)
- WWW '06: Proceedings of the 15th international conference on World Wide Web, page 193--202. New York, NY, USA, ACM Press, (2006)
- Knowledge Discovery in Databases: PKDD 2007, 11th European Conference on Principles and Practice of Knowledge Discovery in Databases, volume 4702 of Lecture Notes in Computer Science, page 506-514. Berlin, Heidelberg, Springer, (2007)
- (August 2005)


user