@article{1103037333,
author = {Hubbard, Bert},
title = {Bounds for eigenvalues of the free and fixed membrane by finite difference methods.},
journal = {Pacific J. Math.},
volume = {11},
number = {4},
year = {1961},
pages = { 559-590},
language = {en},
url = {http://dml.mathdoc.fr/item/1103037333}
}
Hubbard, Bert. Bounds for eigenvalues of the free and fixed membrane by finite difference methods.. Pacific J. Math., Tome 11 (1961) no. 4, pp. 559-590. http://gdmltest.u-ga.fr/item/1103037333/