Geodesic
The relation between the first and second natural frequencies of vibrations of a membrane
Žurnal vyčislitelʹnoj matematiki i matematičeskoj fiziki, Tome 32 (1992) no. 2, pp. 320-325 
A. S. Bratus'; A. D. Myshkis. The relation between the first and second natural frequencies of vibrations of a membrane. Žurnal vyčislitelʹnoj matematiki i matematičeskoj fiziki, Tome 32 (1992) no. 2, pp. 320-325. http://geodesic.mathdoc.fr/item/ZVMMF_1992_32_2_a11/
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Voir la notice de l'article provenant de la source Math-Net.Ru

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