X. Dong, and A. Halevy. SIGMOD '07: Proceedings of the 2007 ACM SIGMOD international conference on Management of data, page 43--54. New York, NY, USA, ACM, (2007)
X. Dong, and A. Halevy. SIGMOD '07: Proceedings of the 2007 ACM SIGMOD international conference on Management of data, page 43--54. New York, NY, USA, ACM, (2007)