title: a language based multidatabase system konrad schwarz , eva kühn , thomas tschernko sigmod conference 1994. authors: nan. venue: nan. year: nan
title: concurrency control in hierarchical multidatabase systems sharad mehrotra , henry f. korth , avi silberschatz 1997. authors: nan. venue: the vldb journal -- the international journal on very large data bases. year: nan