%0 Journal Article
%A E.W. Cheney
%A D.E. Wulbert
%T The Existence and Unicity of Best Approximations.
%J Mathematica Scandinavica
%D 1969
%P 113-140
%V 24
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MS2_1969__24_166085/
%F MS2_1969__24_166085