%0 Journal Article
%A S. N. Kudryavtsev
%T On~approximations of compact sets of functions by piecewise polynomial surfaces
%J Izvestiya. Mathematics 
%D 1988
%P 455-480
%V 31
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/item/IM2_1988_31_3_a1/
%G en
%F IM2_1988_31_3_a1