O. Medelyan, and I. Witten. JCDL '06: Proceedings of the 6th ACM/IEEE-CS joint conference on Digital libraries, page 296--297. New York, NY, USA, ACM, (2006)
M. Pei, K. Nakayama, T. Hara, and S. Nishio. Advanced Information Networking and Applications - Workshops, 2008. AINAW 2008. 22nd International Conference on, page 1205--1210. (2008)
T. Hara, M. Ito, and S. Nishio. CIKM '08: Proceeding of the 17th ACM conference on Information and knowledge management, page 817-826. New York, NY, USA, ACM, (2008)
T. Zesch, C. Müller, and I. Gurevych. Proceedings of the Conference on Language Resources and Evaluation (LREC), electronic proceedings, Ubiquitious Knowledge Processing, Universität Darmstadt, (Mai 2008)