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@article{MAN_1974__211_162631, author = {Ernst Heintze}, title = {On {Homogeneous} {Manifolds} of {Negative} {Curvature.}}, journal = {Mathematische Annalen}, pages = {23--34}, publisher = {mathdoc}, volume = {211}, year = {1974}, zbl = {0273.53042}, url = {http://geodesic.mathdoc.fr/item/MAN_1974__211_162631/} }
Ernst Heintze. On Homogeneous Manifolds of Negative Curvature.. Mathematische Annalen, Tome 211 (1974), pp. 23-34. http://geodesic.mathdoc.fr/item/MAN_1974__211_162631/