TY - JOUR AU - P. M. Gauthier AU - P. V. Paramonov TI - Approximation by harmonic functions in the $C^1$-norm and harmonic $C^1$-content of compact subsets in $\mathbb R^n$ JO - Matematičeskie zametki PY - 1993 SP - 21 EP - 30 VL - 53 IS - 4 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/MZM_1993_53_4_a2/ LA - ru ID - MZM_1993_53_4_a2 ER -