title: lockx : a system for efficiently querying secure xml. authors: s cho , s amer-yahia , l lakshmanan , d srivastava. venue: sigmod conference. year: 2003
title: lockx : a system for efficiently querying secure xml .. authors: sr cho , s amer-yahia , lvs lakshmanan , d srivastava. venue: sigmod conference ,. year: 2003.0