Joaquim Filipe José Cordeiro Enterprise Information Systems, 11th International Conference, ICEIS 2009, Milan, Italy, May 6-10, 2009. Proceedings http://dx.doi.org/10.1007/978-3-642-01347-8 24 2009 978-3-642-01346-1 ICEIS Lecture Notes in Business Information Processing Springer db/conf/iceis/iceis2009.html