title: materialized view selection and maintenance using multi-query optimization sigmod conference 2001. authors: krithi ramamritham , hoshi mistry , prasan roy , s. sudarshan. 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