%0 Journal Article %A A. I. Koshelev %T On precise conditions for smoothness of the solutions of elliptic systems, and Liouville's theorem %J Doklady Akademii Nauk %D 1982 %P 1309-1311 %V 265 %N 6 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1982_265_6_a5/ %G ru %F DAN_1982_265_6_a5