Sourav S. Bhowmick Sanjay Kumar Madria Wee Keong Ng What can a web bag discover for you? 79-119 2002 43 Data Knowl. Eng. 1 db/journals/dke/dke43.html#BhowmickMN02 http://dx.doi.org/10.1016/S0169-023X(02)00123-4