%0 Journal Article
%A M.D. Takev
%T Direct and Inverse Approximation Theorems in R2
%J Mathematica balkanica
%D 2002
%P 53
%V 16
%N 1-4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MABA_2002_16_1-4_a2/
%F MABA_2002_16_1-4_a2