Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{MAN_1978__233_163101, author = {Katsumi Nomizu and Larry Graves}, title = {Isometric {Immersions} of {Lorentzian} {Space} {Forms.}}, journal = {Mathematische Annalen}, pages = {125--136}, publisher = {mathdoc}, volume = {233}, year = {1978}, zbl = {0354.53046}, url = {http://geodesic.mathdoc.fr/item/MAN_1978__233_163101/} }
Katsumi Nomizu; Larry Graves. Isometric Immersions of Lorentzian Space Forms.. Mathematische Annalen, Tome 233 (1978), pp. 125-136. http://geodesic.mathdoc.fr/item/MAN_1978__233_163101/