TY  - JOUR
AU  - G. D. Karatoprakliev
TI  - On the theory of boundary value problems for mixed type equations in multidimensional domains. I
JO  - Differencialʹnye uravneniâ
PY  - 1977
SP  - 64
EP  - 75
VL  - 13
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1977_13_1_a9/
LA  - ru
ID  - DE_1977_13_1_a9
ER  -