TY  - JOUR
AU  - M. M. Zainulabidov
TI  - Certain boundary value problems for equations of mixed type with two perpendicular lines of degeneracy
JO  - Differencialʹnye uravneniâ
PY  - 1969
SP  - 91
EP  - 99
VL  - 5
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1969_5_1_a5/
LA  - ru
ID  - DE_1969_5_1_a5
ER  -