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@article{MZ_1985__189_173575, author = {Takao Yamaguchi}, title = {The {Isometry} {Groups} of {Manifolds} of {Nonpositive} {Curvature} with {Finite} {Volume.}}, journal = {Mathematische Zeitschrift}, pages = {185--192}, publisher = {mathdoc}, volume = {189}, year = {1985}, zbl = {0554.53029}, url = {http://geodesic.mathdoc.fr/item/MZ_1985__189_173575/} }
Takao Yamaguchi. The Isometry Groups of Manifolds of Nonpositive Curvature with Finite Volume.. Mathematische Zeitschrift, Tome 189 (1985), pp. 185-192. http://geodesic.mathdoc.fr/item/MZ_1985__189_173575/