F. Song, and B. Croft. CIKM '99: Proceedings of the eighth international conference on Information and knowledge management, page 316--321. New York, NY, USA, ACM Press, (1999)
C. Mulwa, S. Lawless, M. Ghorab, E. O'Donnell, M. Sharp, and V. Wade. Proceedings of the 19th International Conference on Conceptual Structures (ICCS 2011), volume 6828 of Lecture Notes in Computer Science, page 366-374. Springer, (2011)
M. Smucker, J. Allan, and B. Carterette. CIKM '07: Proceedings of the sixteenth ACM conference on Conference on information and knowledge management, page 623--632. New York, NY, USA, ACM, (2007)
S. Mizzaro. Information Science: Integration in Perspective -- Proceedings of
CoLIS2, page 233-250. Copenhagen, Denmark, The Royal School of Librarianship, (October 1996)