%0 Journal Article
%A I. SINGER
%T On the Extension of Continuous Linear Functionals and Best Approximation in Normed Linear Spaces.
%J Mathematische Annalen
%D 1965
%P 344-355
%V 159
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MAN_1965__159_182694/
%F MAN_1965__159_182694