%0 Journal Article %A P. M. Gauthier %A P. V. Paramonov %T Approximation by harmonic functions in the $C^1$-norm and harmonic $C^1$-content of compact subsets in $\mathbb R^n$ %J Matematičeskie zametki %D 1993 %P 21-30 %V 53 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/MZM_1993_53_4_a2/ %G ru %F MZM_1993_53_4_a2