TY  - JOUR
AU  - N. N. Tarkhanov
TI  - Approximation in Sobolev spaces by solutions of elliptic systems
JO  - Doklady Akademii Nauk
PY  - 1990
SP  - 1308
EP  - 1313
VL  - 315
IS  - 6
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1990_315_6_a5/
LA  - ru
ID  - DAN_1990_315_6_a5
ER  -