N. Deshpande, B. de Vries, and J. van Leeuwen. Progress in Design & Decision Support Systems in Architecture and Urban Planning, 8th International DDSS Conference, 4-7 July, Eindhoven, page 303-312. (2006)
H. Maldonado, B. Lee, S. Klemmer, and R. Pea. Minds, minds, and society. Proceedings of the Computer-supported Collaborative Learning Conference, page 486-495. New Brunswick, NJ, International Society of the Learning Sciences, (2007)