http://www.math.brown.edu/~banchoff/art/PAC-9603/
http://alem3d.obidos.org/
http://www.math.union.edu/locate/Cervone/courses/2001/MTH053-SP
http://www.math.union.edu/locate/Cervone/
http://www.math.union.edu/locate/Cervone/talks/01-10-16.union
http://www.math.union.edu/locate/Cervone/talks/00-11-23.MTCM
http://www.math.union.edu/locate/StageTools
http://www.geomview.com/