http://www.ims.tuwien.ac.at/media/documents/publications/Robert_Liebo_Final.pdf

http://www.lascauxsoftware.com/exp4D.html

http://www.geom.uiuc.edu/~banchoff/script/CFGExp.html

http://www.pacifict.com/Exponential.html

http://dspace.utlib.ee/dspace/bitstream/10062/2557/1/sitov_sergei.pdf

http://lmi.bwh.harvard.edu/~banks/papers/Vis96-Contour_Meshing.pdf

http://www.cs.indiana.edu/~hanson/papers/meshview.pdf