TY  - JOUR
AU  - A. M. Nakhushev
TI  - Certain boundary value problems for hyperbolic equations and equations of mixed type
JO  - Differencialʹnye uravneniâ
PY  - 1969
SP  - 44
EP  - 59
VL  - 5
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1969_5_1_a1/
LA  - ru
ID  - DE_1969_5_1_a1
ER  -