TY  - JOUR
AU  - A. V. Bitsadze
TI  - On the theory of systems of partial differential equations
JO  - Informatics and Automation
PY  - 1976
SP  - 67
EP  - 77
VL  - 142
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/TRSPY_1976_142_a3/
LA  - ru
ID  - TRSPY_1976_142_a3
ER  -