Y. Yanbe, A. Jatowt, S. Nakamura, и K. Tanaka. JCDL '07: Proceedings of the 7th ACM/IEEE-CS joint conference on Digital libraries, стр. 107--116. New York, NY, USA, ACM, (2007)
Y. Song, L. Zhang, и C. Giles. CIKM '08: Proceeding of the 17th ACM conference on Information and knowledge mining, стр. 93--102. New York, NY, USA, ACM, (2008)
M. Noll, и C. Meinel. Proceedings of the 6th International Semantic Web Conference and 2nd Asian Semantic Web Conference (ISWC/ASWC2007), Busan, South Korea, том 4825 из LNCS, стр. 365--378. Berlin, Heidelberg, Springer Verlag, (ноября 2007)