title: integrating a structured-text retrieval system with an object-oriented database system. authors: jurgen annevelink , tak w. yan. venue: vldb. year: 1994
title: an effective deductive object-oriented database through language integration. authors: maria l. barja , norman w. paton , alvaro a. a. fernandes , m. howard williams , andrew dinn. venue: very large data bases. year: 1994