C. Cattuto, D. Benz, A. Hotho, and G. Stumme. The Semantic Web -- ISWC 2008: 7th International Semantic Web Conference, Karlsruhe, Germany, volume 5318 of Lecture Notes in Computer Science, Springer, Berlin, (2008)
L. Hong, E. Chi, R. Budiu, P. Pirolli, and L. Nelson. Proceedings of the Working Conference on Advanced Visual Interfaces (AVI '08), Napoli, Italy, page 65-72. (2008)