@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/}
}