title: information systems research at george mason university. authors: sushil jajodia , amihai motro , edgar h. sibley , alexander brodsky , larry kerschberg , xiaoyang sean wang , daniel barbará. venue: sigmod record. year: 1997
title: database research at columbia university. authors: shih-fu chang , luis gravano , gail e. kaiser , kenneth a. ross , salvatore j. stolfo. venue: acm sigmod record. year: 1998