C. Duarte, and L. Carrico. Proceedings of IUI '06: 10th International Conference on Intelligent User Interfaces, Sydney, Australia, page 132-139. (2006)
T. Pederson, C. Ardito, P. Bottoni, and M. Costabile. Advances in Conceptual Modeling -- Challenges and Opportunities: ER 2008 Workshops CMLSA, ECDM, FP-UML, M2AS, RIGiM, SeCoGIS, WISM, Barcelona, Spain, volume 5232 of Lecture Notes in Computer Science, (2008)
K. Kjær. Proceedings of the 25th IASTED International Multi-Conference: Software Engineering, Innsbruck, Austria, page 148-155. Anaheim, CA, USA, ACTA, (2007)