TY  - JOUR
AU  - N. I. Shkil'
TI  - Systems of linear differential equations with a small parameter coefficient of some of the derivatives
JO  - Differencialʹnye uravneniâ
PY  - 1965
SP  - 868
EP  - 879
VL  - 1
IS  - 7
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1965_1_7_a1/
LA  - ru
ID  - DE_1965_1_7_a1
ER  -