@article{1178228075,
author = {Uesu, Kagumi},
title = {Hadamard manifolds and the visibility axiom},
journal = {Tohoku Math. J. (2)},
volume = {40},
number = {4},
year = {1988},
pages = { 27-34},
language = {en},
url = {http://dml.mathdoc.fr/item/1178228075}
}
Uesu, Kagumi. Hadamard manifolds and the visibility axiom. Tohoku Math. J. (2), Tome 40 (1988) no. 4, pp. 27-34. http://gdmltest.u-ga.fr/item/1178228075/