@article{1250520826,
author = {\^Otsuki, Nobukazu},
title = {Lyapunov-like functions and geodesic flows},
journal = {J. Math. Kyoto Univ.},
volume = {26},
number = {4},
year = {1986},
pages = { 559-569},
language = {en},
url = {http://dml.mathdoc.fr/item/1250520826}
}
Ôtsuki, Nobukazu. Lyapunov-like functions and geodesic flows. J. Math. Kyoto Univ., Tome 26 (1986) no. 4, pp. 559-569. http://gdmltest.u-ga.fr/item/1250520826/