@article{1178241341, author = {Tanno, Sh\v ukichi}, title = {Eigenvalues of the Laplacian of Riemannian manifolds}, journal = {Tohoku Math. J. (2)}, volume = {25}, number = {4}, year = {1973}, pages = { 391-403}, language = {en}, url = {http://dml.mathdoc.fr/item/1178241341} }
Tanno, Shǔkichi. Eigenvalues of the Laplacian of Riemannian manifolds. Tohoku Math. J. (2), Tome 25 (1973) no. 4, pp. 391-403. http://gdmltest.u-ga.fr/item/1178241341/