%0 Journal Article
%A M. P. Heble
%T Approximation of Differentiable Functions on a Hilbert Space. III.
%J Mathematische Annalen
%D 1988
%P 473-484
%V 282
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MAN_1988__282_2_164474/
%F MAN_1988__282_2_164474