title: optimizing queries with universal quantification in object-oriented and object-relational databases. authors: guido moerkotte , jens claußen , klaus peithner , alfons kemper. venue: vldb. year: 1997
title: efficiently instantiating view-objects from remote relational databases. authors: byung suk lee , gio wiederhold. venue: the vldb journal -- the international journal on very large data bases. year: 1994