1. A unified environment for presenting, developing and analyzing graphics algorithms;Wernert;Comput. Graph.,1997
2. Interactive teaching modules for computer graphics;Naiman;Comput. Graph.,1996
3. Design and integration of visualization tools for the graphics classroom;Schweitzer;Comput. Graph.,1995
4. ISO/IEC JTC1 SC24 1997 DIS 14772-1, http://www.vrml.org/Specifications/VRML97/DIS/.
5. C. Marrin, Proposal for a VRML 2.0 informative annex: external authoring interface reference, http://vrml.sgi.com/moving-worlds/spec/ExternalInterface.html, 1997.