TY  - JOUR
AU  - A. V. Bitsadze
TI  - Equations of mixed type in three-dimensional regions
JO  - Doklady Akademii Nauk
PY  - 1962
SP  - 1017
EP  - 1019
VL  - 143
IS  - 5
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1962_143_5_a2/
LA  - ru
ID  - DAN_1962_143_5_a2
ER  -