@article{GDZPPN002310031,
title = {On the Total Absolute Curvature of Closed Curves in Manifolds of Negative Curvature.},
journal = {Mathematische Annalen},
volume = {212},
year = {1974},
pages = {313-320},
zbl = {0273.53033},
url = {http://dml.mathdoc.fr/item/GDZPPN002310031}
}
Tsukamoto, Yôtarô. On the Total Absolute Curvature of Closed Curves in Manifolds of Negative Curvature.. Mathematische Annalen, Tome 212 (1974) pp. 313-320. http://gdmltest.u-ga.fr/item/GDZPPN002310031/