TY  - JOUR
AU  - L. P. Cherenkova
TI  - The simultaneity of systems of two differential equations
JO  - Differencialʹnye uravneniâ
PY  - 1971
SP  - 1723
EP  - 1726
VL  - 7
IS  - 9
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1971_7_9_a24/
LA  - ru
ID  - DE_1971_7_9_a24
ER  -