title: a query language and optimization techniques for unstructured data. authors: gerd g. hillebrand , peter buneman , susan b. davidson , dan suciu. venue: sigmod conference. year: 1996.0
title: the onion technique : indexing for linear optimization queries yuan-chi chang , lawrence bergman , vittorio castelli , chung-sheng li , ming-ling lo , john r. smith 2000. authors: nan. venue: international conference on management of data. year: nan