Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DAN_1976_226_6_a13, author = {A. I. Neishtadt}, title = {Averaging in multifrequency {systems.~II}}, journal = {Doklady Akademii Nauk}, pages = {1295--1298}, publisher = {mathdoc}, volume = {226}, number = {6}, year = {1976}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1976_226_6_a13/} }
A. I. Neishtadt. Averaging in multifrequency systems.~II. Doklady Akademii Nauk, Tome 226 (1976) no. 6, pp. 1295-1298. http://geodesic.mathdoc.fr/item/DAN_1976_226_6_a13/