title: query caching and optimization in distributed mediator systems s adali , k candan , y papakonstantinou , v subrahmanian sigmod conference. authors: nan. venue: nan. year: 1996.0
title: concept-based querying in mediator systems 2005.0. authors: ku sattler , i geist , e schallehn. venue: the vldb journal the international journal on very large & hellip ; ,. year: nan