%0 Journal Article
%A Bellman, Richard
%T A note on differential approximation and orthogonal polynomials.
%J Bollettino della Unione matematica italiana
%D 1963
%P 363-366
%V 18
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/BUMI_1963_3_18_4_a3/
%G en
%F BUMI_1963_3_18_4_a3