title: semantic integration in heterogeneous databases using neural networks. authors: chris clifton , wen-syan li. venue: vldb. year: 1994
title: semantic access : semantic interface for querying databases. authors: naphtali rishe , jun yuan , rukshan athauda , shu-ching chen , xiaoling lu , xiaobin ma , alexander vaschillo , artyom shaposhnikov , dmitry vasilevsky. venue: very large data bases. year: 2000