TY  - JOUR
AU  - M. M. Smirnov
TI  - The first boundary value problem for a certain equation of mixed type
JO  - Differencialʹnye uravneniâ
PY  - 1968
SP  - 1663
EP  - 1666
VL  - 4
IS  - 9
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1968_4_9_a11/
LA  - ru
ID  - DE_1968_4_9_a11
ER  -