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@article{MAN_1973__205_162488, author = {Katsumi Nomizu}, title = {Isometric {Immersions} of the {Hyperbolic} {Plane} into the {Hyperbolic} {Space.}}, journal = {Mathematische Annalen}, pages = {181--192}, publisher = {mathdoc}, volume = {205}, year = {1973}, zbl = {0256.53042}, url = {http://geodesic.mathdoc.fr/item/MAN_1973__205_162488/} }
Katsumi Nomizu. Isometric Immersions of the Hyperbolic Plane into the Hyperbolic Space.. Mathematische Annalen, Tome 205 (1973), pp. 181-192. http://geodesic.mathdoc.fr/item/MAN_1973__205_162488/