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@article{DAN_1974_217_5_a8, author = {M. M. Khapaev}, title = {On averaging in multifrequency systems}, journal = {Doklady Akademii Nauk}, pages = {1021--1024}, publisher = {mathdoc}, volume = {217}, number = {5}, year = {1974}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1974_217_5_a8/} }
M. M. Khapaev. On averaging in multifrequency systems. Doklady Akademii Nauk, Tome 217 (1974) no. 5, pp. 1021-1024. http://geodesic.mathdoc.fr/item/DAN_1974_217_5_a8/