S. Brin, R. Motwani, J. Ullman, and S. Tsur. SIGMOD '97: Proceedings of the 1997 ACM SIGMOD international conference
on Management of data, page 255--264. New York, NY, USA, ACM, (1997)
S. Brin, R. Motwani, J. Ullman, and S. Tsur. SIGMOD '97: Proc. of the 1997 ACM SIGMOD international conference on Management of data, page 255--264. New York, NY, USA, ACM, (1997)