TY  - JOUR
AU  - G. S. Krechetov
TI  - Lower and upper bounds for solutions of some classes of first-order differential equations
JO  - Differencialʹnye uravneniâ
PY  - 1989
SP  - 1523
EP  - 1526
VL  - 25
IS  - 9
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1989_25_9_a7/
LA  - ru
ID  - DE_1989_25_9_a7
ER  -