@article{CMH_1977__52_139710,
     author = {Robert C. Reilly},
     title = {On the first eigenvalue of the {Laplacian} for compact submanifolds of {Euclidean} space.},
     journal = {Commentarii mathematici Helvetici},
     pages = {525--534},
     year = {1977},
     volume = {52},
     zbl = {0382.53038},
     url = {http://geodesic.mathdoc.fr/item/CMH_1977__52_139710/}
}