Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DAN_1975_223_2_a14, author = {A. I. Neishtadt}, title = {Averaging in multifrequency systems}, journal = {Doklady Akademii Nauk}, pages = {314--317}, publisher = {mathdoc}, volume = {223}, number = {2}, year = {1975}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1975_223_2_a14/} }
A. I. Neishtadt. Averaging in multifrequency systems. Doklady Akademii Nauk, Tome 223 (1975) no. 2, pp. 314-317. http://geodesic.mathdoc.fr/item/DAN_1975_223_2_a14/