TY  - JOUR
AU  - Ch. A. Skhalyaho
TI  - The oscillatory nature of solutions of systems of two differential equations with sign-variable right-hand sides
JO  - Differencialʹnye uravneniâ
PY  - 1992
SP  - 1736
EP  - 1747
VL  - 28
IS  - 10
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1992_28_10_a9/
LA  - ru
ID  - DE_1992_28_10_a9
ER  -