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@article{VM_1999_1_1_a9, author = {Bernd Wegner}, title = {Tangential {Symmetries} of {Planar} {Curves} and {Space} {Curves}}, journal = {Visual Mathematics}, publisher = {mathdoc}, volume = {1}, number = {1}, year = {1999}, url = {http://geodesic.mathdoc.fr/item/VM_1999_1_1_a9/} }
Bernd Wegner. Tangential Symmetries of Planar Curves and Space Curves. Visual Mathematics, Tome 1 (1999) no. 1. http://geodesic.mathdoc.fr/item/VM_1999_1_1_a9/