TY  - JOUR
AU  - G. D. Dachev
TI  - On the existence of smooth solutions of boundary value problems for a class of equations of mixed type
JO  - Differencialʹnye uravneniâ
PY  - 1991
SP  - 619
EP  - 627
VL  - 27
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1991_27_4_a7/
LA  - ru
ID  - DE_1991_27_4_a7
ER  -