TY  - JOUR
AU  - S. M. Ponomarev
TI  - On some boundary value problems for equations of mixed type with a spectral parameter
JO  - Doklady Akademii Nauk
PY  - 1981
SP  - 1074
EP  - 1078
VL  - 260
IS  - 5
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1981_260_5_a12/
LA  - ru
ID  - DAN_1981_260_5_a12
ER  -