K. Liu, B. Fang, and W. Zhang. Proceedings of the 19th ACM International Conference on Information and Knowledge Management, page 1109--1118. New York, NY, USA, ACM, (2010)
L. Silva, and L. Jayaratne. Applications of Digital Information and Web Technologies, 2009. ICADIWT '09. Second International Conference on the, page 446-451. (August 2009)
C. Brewster, F. Ciravegna, and Y. Wilks. NLDB '02: Proceedings of the 6th International Conference on Applications of Natural Language to Information Systems-Revised Papers, page 203--207. London, UK, Springer-Verlag, (2002)
S. Rudolph, J. Völker, and P. Hitzler. Proceedings of the 15th International Conference on Conceptual Structures (ICCS 2007), volume 4604 of Lecture Notes in Artificial Intelligence, page 488-491. Berlin, Heidelberg, Springer-Verlag, (July 2007)