Y. Tan, M. Kan, and D. Lee. JCDL '06: Proceedings of the 6th ACM/IEEE-CS joint conference on Digital libraries, page 314--315. New York, NY, USA, ACM, (2006)
C. Firan, W. Nejdl, and R. Paiu. LA-WEB '07: Proceedings of the 2007 Latin American Web Conference, page 32--41. Washington, DC, USA, IEEE Computer Society, (2007)
P. Liang, M. Jordan, and B. Taskar. ICML '07: Proceedings of the 24th international conference on Machine learning, page 545--552. New York, NY, USA, ACM, (2007)
M. Jordan. BIBM '07: Proceedings of the 2007 IEEE International Conference on Bioinformatics and Biomedicine, page 4. Washington, DC, USA, IEEE Computer Society, (2007)
?. published on the web by University of Pittsburgh, School of Information Sciences, (2003)Report on the NSF Workshop on Research Directions for Digital Libraries, June 15-17, 2003, Chatham, MA.
C. Cattuto, D. Benz, A. Hotho, and G. Stumme. The Semantic Web - ISWC 2008, Proc.Intl. Semantic Web Conference 2008, volume 5318 of LNAI, page 615--631. Heidelberg, Springer, (2008)