J. Jeon, V. Lavrenko, and R. Manmatha. Proceedings of the 26th Annual International ACM SIGIR Conference on Research and Development in Informaion Retrieval, page 119--126. New York, NY, USA, ACM, (2003)
J. Moore, F. Steinke, and and V. Tresp. Proceedings of 3rd International Workshop on Inductive Reasoning and Machine Learning for the Semantic Web (IRMLeS 2011), Heraklion, Greece, (May 2011)
M. Dowman, V. Tablan, H. Cunningham, and B. Popov. Proceedings of the 14th International World Wide Web Conference, Chiba, Japan, (2005)http://gate.ac.uk/sale/www05/web-assisted-annotation.pdf.
R. Fang, B. He, M. Lu, K. Yang, N. Govindaraju, Q. Luo, and P. Sander. SIGMOD '07: Proceedings of the 2007 ACM SIGMOD international conference on Management of data, page 1061--1063. New York, NY, USA, ACM, (2007)