@article{1178242547,
author = {Sakai, Takashi},
title = {On eigen-values of Laplacian and curvature of Riemannian manifold},
journal = {Tohoku Math. J. (2)},
volume = {23},
number = {4},
year = {1971},
pages = { 589-603},
language = {en},
url = {http://dml.mathdoc.fr/item/1178242547}
}
Sakai, Takashi. On eigen-values of Laplacian and curvature of Riemannian manifold. Tohoku Math. J. (2), Tome 23 (1971) no. 4, pp. 589-603. http://gdmltest.u-ga.fr/item/1178242547/