title: approximate query translation across heterogeneous information sources. authors: hector garcia-molina , kevin chen-chuan chang. venue: vldb. year: 2000
title: approximate query mapping : accounting for translation closeness. authors: kevin chen-chuan chang , h &#233; ctor garc &#237; a-molina. venue: the vldb journal -- the international journal on very large data bases. year: 2001