@article{GDZPPN002385465, title = {On the characteristic frequencies of a symmetric membrane.}, journal = {Mathematische Zeitschrift}, volume = {62}, year = {1955}, pages = {331-337}, zbl = {0065.08703}, url = {http://dml.mathdoc.fr/item/GDZPPN002385465} }
Pólya, G. On the characteristic frequencies of a symmetric membrane.. Mathematische Zeitschrift, Tome 62 (1955) pp. 331-337. http://gdmltest.u-ga.fr/item/GDZPPN002385465/