TY  - JOUR
AU  - A. G. Baskakov
TI  - The averaging method in the theory of perturbations of linear differential operators
JO  - Differencialʹnye uravneniâ
PY  - 1985
SP  - 555
EP  - 562
VL  - 21
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1985_21_4_a0/
LA  - ru
ID  - DE_1985_21_4_a0
ER  -