%0 Journal Article
%A Salem A. Sahab
%A Kahn 

 M. S.
%T Some results on best approximation
%J Novi Sad Journal of Mathematics
%D 1987
%P 143-152
%V 17
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/NSJOM_1987_17_1a_9/
%F NSJOM_1987_17_1a_9