@article{1138845339,
author = {Okumura, Masafumi},
title = {Totally umbilical hypersurfaces of a locally product Riemannian manifold},
journal = {Kodai Math. Sem. Rep.},
volume = {19},
number = {1},
year = {1967},
pages = { 35-42},
language = {en},
url = {http://dml.mathdoc.fr/item/1138845339}
}
Okumura, Masafumi. Totally umbilical hypersurfaces of a locally product Riemannian manifold. Kodai Math. Sem. Rep., Tome 19 (1967) no. 1, pp. 35-42. http://gdmltest.u-ga.fr/item/1138845339/