title: the algres testbed of chimera : an active object-oriented database system giuseppe psaila , stefano ceri , stefano paraboschi , piero fraternali. authors: nan. venue: sigmod conference. year: 1995.0
title: exact : an extensible approach to active object-oriented databases. authors: oscar d &#237; az , arturo jaime. venue: the vldb journal -- the international journal on very large data bases. year: 1997.0