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