TY  - JOUR
AU  - Yu. I. Kovach
TI  - Application of the theorem of differential inequalities to the Goursat problem for a linear system of partial differential equations
JO  - Differencialʹnye uravneniâ
PY  - 1965
SP  - 411
EP  - 420
VL  - 1
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1965_1_3_a15/
LA  - ru
ID  - DE_1965_1_3_a15
ER  -