TY  - JOUR
AU  - Ya. N. Mamedov
TI  - On the eigenvalue problem for equations of mixed type
JO  - Differencialʹnye uravneniâ
PY  - 1993
SP  - 95
EP  - 103
VL  - 29
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1993_29_1_a12/
LA  - ru
ID  - DE_1993_29_1_a12
ER  -