TY  - JOUR
AU  - E. A. Kalita
TI  - Solubility of non-linear elliptic systems in spaces that are weaker than the natural energy space
JO  - Izvestiya. Mathematics 
PY  - 1997
SP  - 285
EP  - 315
VL  - 61
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/IM2_1997_61_2_a2/
LA  - en
ID  - IM2_1997_61_2_a2
ER  -