X. Yan, P. Yu, and J. Han. Proceedings of the 2004 ACM SIGMOD International Conference on Management of Data, page 335--346. New York, NY, USA, ACM, (2004)
J. Han, J. Pei, and Y. Yin. ACM International Conference on Management of Data and Symposium on Principles of Database Systems, SIGMOD/PODS 2000, Dallas, TX, USA, May 15-18, 2000, page 1-12. New York, NY, USA, ACM, (2000)