title: learning response time for websources using query feedback and application in query optimization jean-robert gruser , vladimir zadorozhny , louiqa raschid , tao zhan vldb j. 2000. authors: nan. venue: nan. year: nan
title: outerjoin simplification and reordering for query optimization acm transactions on database systems ( tods ). authors: c &#233; sar galindo-legaria , arnon rosenthal. venue: nan. year: 1997.0