TY  - JOUR
AU  - A. V. Dragilev
TI  - A certain theorem and a problem from the qualitative theory of differential equations
JO  - Differencialʹnye uravneniâ
PY  - 1965
SP  - 1679
EP  - 1681
VL  - 1
IS  - 12
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1965_1_12_a14/
LA  - ru
ID  - DE_1965_1_12_a14
ER  -