@article{GDZPPN002308592,
title = {Isometric Immersions of the Hyperbolic Plane into the Hyperbolic Space.},
journal = {Mathematische Annalen},
volume = {201},
year = {1973},
pages = {181-192},
zbl = {0256.53042},
url = {http://dml.mathdoc.fr/item/GDZPPN002308592}
}
Nomizu, Katsumi. Isometric Immersions of the Hyperbolic Plane into the Hyperbolic Space.. Mathematische Annalen, Tome 201 (1973) pp. 181-192. http://gdmltest.u-ga.fr/item/GDZPPN002308592/