TY  - JOUR
AU  - P. V. Berkhin
TI  - On a boundary value problem for equations of composite type
JO  - Doklady Akademii Nauk
PY  - 1974
SP  - 496
EP  - 498
VL  - 214
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1974_214_3_a2/
LA  - ru
ID  - DAN_1974_214_3_a2
ER  -