title: data and knowledge base research at hong kong university of science and technology. authors: p drew , b hamidzadeh , k karlapalem , a kean , d lee , q li , f lochovsky , c shum , b wќthrich. venue: sigmod record. year: 1995
title: database research at columbia university. authors: sf chang , l gravano , ge kaiser , ka ross , sj stolfo. venue: sigmod record ,. year: 1998.0