Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{PORMA_1941__2_1_114572, author = {Weinstein, A.}, title = {Les vibrations et le calcul des variations}, journal = {Portugaliae mathematica}, pages = {36--55}, publisher = {mathdoc}, volume = {2}, number = {1}, year = {1941}, mrnumber = {0003910}, zbl = {0024.20402}, language = {fr}, url = {http://geodesic.mathdoc.fr/item/PORMA_1941__2_1_114572/} }
Weinstein, A. Les vibrations et le calcul des variations. Portugaliae mathematica, Tome 2 (1941) no. 1, pp. 36-55. http://geodesic.mathdoc.fr/item/PORMA_1941__2_1_114572/