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@article{MZ_1955__63_169534, author = {G. P\'olya}, title = {On the characteristic frequencies of a symmetric membrane.}, journal = {Mathematische Zeitschrift}, pages = {331--337}, publisher = {mathdoc}, volume = {63}, year = {1955}, zbl = {0065.08703}, url = {http://geodesic.mathdoc.fr/item/MZ_1955__63_169534/} }
G. Pólya. On the characteristic frequencies of a symmetric membrane.. Mathematische Zeitschrift, Tome 63 (1955), pp. 331-337. http://geodesic.mathdoc.fr/item/MZ_1955__63_169534/