title: an adaptive query execution system for data integration. authors: daniel s. weld , alon y. levy , marc friedman , zachary g. ives , daniela florescu. venue: sigmod conference. year: 1999
title: infomaster : an information integration system. authors: michael r. genesereth , arthur m. keller , oliver m. duschka. venue: international conference on management of data. year: 1997