%0 Journal Article
%A P. V. Paramonov
%T On~approximation by harmonic polynomials in the $C^1$-norm on compact sets in~$\mathbf R^2$
%J Izvestiya. Mathematics 
%D 1994
%P 321-331
%V 42
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/IM2_1994_42_2_a3/
%G en
%F IM2_1994_42_2_a3