B. Schönhage, A. van Ballegooij, и A. Elliëns. Proceedings of the fifth symposium on Virtual reality modeling language (Web3D-VRML), стр. 131--138. New York, NY, USA, ACM, (2000)
M. Raschke, T. Schlegel, и T. Ertl. Proceedings of the International Symposium Scientific Computing for the Cognitive Sciences, Universität Heidelberg, (2010)