TY  - JOUR
AU  - A. V. Kostin
TI  - Asymptotic series in the theory of nonlinear systems of ordinary differential equations. I
JO  - Differencialʹnye uravneniâ
PY  - 1967
SP  - 875
EP  - 889
VL  - 3
IS  - 6
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1967_3_6_a0/
LA  - ru
ID  - DE_1967_3_6_a0
ER  -