TY  - JOUR
AU  - M. M. Khapaev
TI  - On averaging in multifrequency systems
JO  - Doklady Akademii Nauk
PY  - 1974
SP  - 1021
EP  - 1024
VL  - 217
IS  - 5
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1974_217_5_a8/
LA  - ru
ID  - DAN_1974_217_5_a8
ER  -