TY  - JOUR
AU  - S. R. Umarov
TI  - Some boundary value problems for elliptic equations with a
JO  - Doklady Akademii Nauk
PY  - 1993
SP  - 708
EP  - 710
VL  - 333
IS  - 6
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1993_333_6_a5/
LA  - ru
ID  - DAN_1993_333_6_a5
ER  -