user- Proceedings of the Collaborative Web Tagging Workshop at the WWW 2006, Edinburgh, Scotland, (May 2006)
- 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)
- 30th European Conference on IR Research, ECIR 2008, volume 4956 of Lecture Notes in Computer Science, page 101-113. Glasgow, UK, Springer, (April 2008)
- Proc. of the Fourth International Workshop on Adversarial Information Retrieval on the Web, (2008)
- Proceedings of the First Conceptual Structures Tool Interoperability Workshop at the 14th International Conference on Conceptual Structures, page 87-102. Aalborg, Aalborg Universitetsforlag, (2006)
