%0 Journal Article
%A W.G. BROWN
%T On the Existence of Square Roots in certain Rings of Power Series.
%J Mathematische Annalen
%D 1965
%P 82-89
%V 158
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MAN_1965__158_161257/
%F MAN_1965__158_161257