user- dexa (2007)
- P2PIR '05: Proceedings of the 2005 ACM workshop on Information retrieval in peer-to-peer networks, page 33--40. New York, NY, USA, ACM, (2005)
- WikiSym '06: Proceedings of the 2006 international symposium on Wikis, page 135--136. New York, NY, USA, ACM, (2006)
- ICLS '06: Proceedings of the 7th international conference on Learning sciences, page 1048--1052. International Society of the Learning Sciences, (2006)
- WWW '08: Proceeding of the 17th international conference on World Wide Web, page 935--944. New York, NY, USA, ACM, (2008)
