@article{GDZPPN002430479,
title = {The Isometry Groups of Manifolds of Nonpositive Curvature with Finite Volume.},
journal = {Mathematische Zeitschrift},
volume = {189},
year = {1985},
pages = {185-192},
zbl = {0554.53029},
url = {http://dml.mathdoc.fr/item/GDZPPN002430479}
}
Yamaguchi, Takao. The Isometry Groups of Manifolds of Nonpositive Curvature with Finite Volume.. Mathematische Zeitschrift, Tome 189 (1985) pp. 185-192. http://gdmltest.u-ga.fr/item/GDZPPN002430479/