@article{1103044799,
author = {Forsythe, George E.},
title = {Asymptotic lower bounds for the frequencies of certain polygonal membranes.},
journal = {Pacific J. Math.},
volume = {4},
number = {4},
year = {1954},
pages = { 467-480},
language = {en},
url = {http://dml.mathdoc.fr/item/1103044799}
}
Forsythe, George E. Asymptotic lower bounds for the frequencies of certain polygonal membranes.. Pacific J. Math., Tome 4 (1954) no. 4, pp. 467-480. http://gdmltest.u-ga.fr/item/1103044799/