Zaiqing Nie Subbarao Kambhampati Ullas Nambiar Sreelakshmi Vaddi Mining source coverage statistics for data integration. 1-8 2001 conf/widm/2001 WIDM http://doi.acm.org/10.1145/502932.502934 db/conf/widm/widm2001.html#NieKNV01