title: infoharness : a system for search and retrieval of heterogeneous information. authors: amit p. sheth , vipul kashyap , satish thatte , leon a. shklar. venue: sigmod conference. year: 1995
title: quality-driven integration of heterogenous information systems. authors: felix naumann , ulf leser , johann christoph freytag. venue: very large data bases. year: 1999