W. Marco Schorlemmer Yannis Kalfoglou Manuel Atencia A Formal Foundation for Ontology-Alignment Interaction Models. 50-68 2007 3 Int. J. Semantic Web Inf. Syst. 2 http://www.igi-pub.com/articles/details.asp?ID=7155 db/journals/ijswis/ijswis3.html#SchorlemmerKA07