B. Neumayr, M. Schrefl, and B. Thalheim. The Evolution of Conceptual Modeling, volume 6520 of Lecture Notes in Computer Science, page 68-92. Springer, (2008)
I. Markovic, and F. Hasibether. Enterprise Information Systems, 11th International Conference, ICEIS 2009, Milan, Italy, May 6-10, 2009. Proceedings, volume 24 of Lecture Notes in Business Information Processing, page 286--290. Berlin, Institute for Systems and Technologies of Information, Control and Communication, Springer, (2009)Area 3 - Information Systems Analysis and Specification.