user- Proc. FGIR 2006, (2006)
- The Semantic Web: Research and Applications, volume 4011 of LNAI, page 411-426. Heidelberg, Springer, (June 2006)
- AI Communications Journal, Special Issue on "Network Analysis in Natural Sciences and Engineering" (2007)
- D-Lib Magazine (2006)
- Int’l Journal on Semantic Web & Information Systems (2007)
- Journal of Artificial Intelligence Research (2007)
- (May 2005)
- AI Communications (2007)
- Proc. WWW2007 Workshop "Tagging and Metadata for Social Information Organization", Banff, (May 8, 2007)An extended version appeared in AI Communications. .
- HYPERTEXT '06: Proceedings of the seventeenth conference on Hypertext and hypermedia, page 31--40. New York, NY, USA, ACM Press, (2006)
