TY  - JOUR
AU  - A. V. Bitsadze
TI  - On the problem of equations of mixed type
JO  - Informatics and Automation
PY  - 1953
SP  - 3
EP  - 59
VL  - 41
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/TRSPY_1953_41_a0/
LA  - ru
ID  - TRSPY_1953_41_a0
ER  -