1. Ishida, T., Akahani, J., Hiramatsu, K., Isbister, K., Lisowski, S., Nakanishi, H., Okamoto, M., Miyazaki, Y. and Tsutsuguchi, K.: “Digital City Kyoto: Towards A Social Information Infrastructure,” Cooperative Information Agents III, Lecture Notes in Artificial Intelligence, M. Klusch, O. Shehory, G. Weiss (Eds.), Springer-Verlag, Vol. 1652 (1999) 23–35
2. Woo, M., Neider, J. and Davis T.: OpenGL Programming Guide Second Edition. Addison-Wesley (1997)
3. Carlson, D. A. and Hodgins, J. K.: Simulation Levels of Detail for Real-time Animation. Porc. Graphics Interface’ 97 (1997) 1–8
4. Cohen, J., Olano, M. and Manocha, D.: Appearance-Preserving Simplification: Porc. SIGGRAPH’ 98 (1998) 115–122
5. Eck, M., DeRose, T., Duchamp, T., Hoppe, H., Lounsbery, M. and Stuetzle, W.: Multiresolution Analysis of Arbitrary Meshes. Proc. SIGGRAPH’ 95 (1995) 173–182