title: genesys : a system for efficient spatial query processing sigmod conference 1994. authors: t brinkhoff , h kriegel , r schneider , b seeger. venue: nan. year: nan
title: lockx : a system for efficiently querying secure xml . sr cho , s amer-yahia , lvs lakshmanan , d srivastava sigmod conference ,. authors: nan. venue: nan. year: 2003.0