TY  - JOUR
AU  - Ya. A. Roitberg
TI  - Isomorphism theorems and elliptic problems with potentials
JO  - Doklady Akademii Nauk
PY  - 1973
SP  - 33
EP  - 36
VL  - 210
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1973_210_1_a7/
LA  - ru
ID  - DAN_1973_210_1_a7
ER  -