title: an effective deductive object-oriented database through language integration 1994. authors: m. howard williams , norman w. paton , andrew dinn , maria l. barja , alvaro a. a. fernandes. venue: vldb. year: nan
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