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@article{MM2_1986__57_155187, author = {Eberhard Teufel}, title = {On the total absolute curvature of closed curves in spheres.}, journal = {Manuscripta mathematica}, pages = {101--108}, publisher = {mathdoc}, volume = {57}, year = {1986}, zbl = {0589.53001}, url = {http://geodesic.mathdoc.fr/item/MM2_1986__57_155187/} }
Eberhard Teufel. On the total absolute curvature of closed curves in spheres.. Manuscripta mathematica, Tome 57 (1986), pp. 101-108. http://geodesic.mathdoc.fr/item/MM2_1986__57_155187/