TY  - JOUR
AU  - M. B. Kudaev
TI  - Nonoscillation and monotonicity of solutions of a differential
JO  - Doklady Akademii Nauk
PY  - 1991
SP  - 789
EP  - 791
VL  - 320
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1991_320_4_a3/
LA  - ru
ID  - DAN_1991_320_4_a3
ER  -