TY  - JOUR
AU  - A. N. Filatov
TI  - Averaging in systems of differential equations, unsolvable with respect to the derivative
JO  - Doklady Akademii Nauk
PY  - 1967
SP  - 795
EP  - 797
VL  - 172
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1967_172_4_a12/
LA  - ru
ID  - DAN_1967_172_4_a12
ER  -