Ronald Fagin Laura M. Haas Mauricio A. Hernández Renée J. Miller Lucian Popa Yannis Velegrakis Clio: Schema Mapping Creation and Data Exchange. 198-236 2009 Conceptual Modeling: Foundations and Applications http://dx.doi.org/10.1007/978-3-642-02463-4_12 conf/birthday/2009mylopoulos db/conf/birthday/mylopoulos2009.html#FaginHHMPV09