title: on completeness of historical relational query languages j clifford , a croker , a tuzhilin. authors: nan. venue: acm trans . database syst .. year: 1994.0
title: a. tuzhilin . on completeness of historical relational query languages working paper stern is-91-41 , center for research on information. authors: j cliord , a croker. venue: nan. year: nan