title: vxmlr : a visual xml-relational database system vldb. authors: a zhou , h lu , s zheng , y liang , l zhang , w ji , z tian. venue: nan. year: 2001.0
title: access path selection in a relational database management system sigmod conference , 1979.0. authors: pg selinger , mm astrahan , dd chamberlin. venue: nan. year: nan