@article{MAN_1981__258_163612,
     author = {Eberhard Teufel},
     title = {Differential {Topology} and the {Computation} of  {Total} {Absolute} {Curvature.}},
     journal = {Mathematische Annalen},
     pages = {471--480},
     year = {1981},
     volume = {258},
     zbl = {0464.53049},
     url = {http://geodesic.mathdoc.fr/item/MAN_1981__258_163612/}
}