%0 Journal Article
%A P. V. Paramonov
%T On harmonic approximation in the $C^1$-norm
%J Sbornik. Mathematics
%D 1992
%P 183-207
%V 71
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/SM_1992_71_1_a11/
%G en
%F SM_1992_71_1_a11