title: supporting top-k join queries in relational databases walid g. aref , ahmed k. elmagarmid , ihab f. ilyas vldb 2003. authors: nan. venue: nan. year: nan
title: top-k selection queries over relational databases : mapping strategies and performance evaluation nicolas bruno , surajit chaudhuri , luis gravano 2002. authors: nan. venue: acm transactions on database systems ( tods ). year: nan