J. Conrad, K. Al-Kofahi, Y. Zhao, and G. Karypis. Proceedings of the 10th International Conference on Artificial Intelligence and Law, page 177--187. New York, NY, USA, ACM, (2005)
L. Zhao, and M. Zaki. SIGMOD '05: Proceedings of the 2005 ACM SIGMOD international conference on Management of data, page 694--705. New York, NY, USA, ACM, (2005)