@article{GDZPPN002062666,
title = {On the first eigenvalue of the Laplacian for compact submanifolds of Euclidean space.},
journal = {Commentarii mathematici Helvetici},
volume = {52},
year = {1977},
pages = {525-534},
zbl = {0382.53038},
url = {http://dml.mathdoc.fr/item/GDZPPN002062666}
}
Reilly, Robert C. On the first eigenvalue of the Laplacian for compact submanifolds of Euclidean space.. Commentarii mathematici Helvetici, Tome 52 (1977) pp. 525-534. http://gdmltest.u-ga.fr/item/GDZPPN002062666/