S. Lynden, I. Kojima, A. Matono, and Y. Tanimura. Databases in Networked Information Systems: 6th International Workshop, DNIS 2010, Aizu-Wakamatsu, Japan, (2010)
A. Gal, and P. Shvaiko. Advances in Web Semantics I: Ontologies, Web Services and Applied Semantic Web, volume 4891 of Lecture Notes in Computer Science, Springer, Berlin, (2009)