title: a language based multidatabase system konrad schwarz , eva kühn , thomas tschernko sigmod conference 1994. authors: nan. venue: nan. year: nan
title: schemasql - a language for interoperability in relational multi-database systems very large data bases. authors: laks v. s. lakshmanan , fereidoon sadri , iyer n. subramanian. venue: nan. year: 1996.0