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Cheng Hian Goh Stéphane Bressan Stuart E. Madnick Michael Siegel Context Interchange: New Features and Formalisms for the Intelligent Integration of Information. 270-293 1999 17 ACM Trans. Inf. Syst. 3 http://doi.acm.org/10.1145/314516.314520 db/journals/tois/tois17.html#GohBMS99