Free Models These are card models I have designed, and may be downloaded for your personal enjoyment. You can either print them yourself or (in some cases) purchase a pre-printed kit from Paper Models International. To print your own mode
E. Oren, J. Breslin, and S. Decker. WWW '06: Proceedings of the 15th international conference on World Wide Web, page 1071--1072. New York, NY, USA, ACM Press, (2006)