%0 Journal Article %A M. S. Mel'nikov %A P. V. Paramonov %T $C^1$-extension of subharmonic functions from closed Jordan domains in~$\mathbb R^2$ %J Izvestiya. Mathematics %D 2004 %P 1165-1178 %V 68 %N 6 %I mathdoc %U http://geodesic.mathdoc.fr/item/IM2_2004_68_6_a5/ %G en %F IM2_2004_68_6_a5