%0 Journal Article
%A Jesus J. Ortega
%T On the Pythagoras number of a real irreducible algebroid curve.
%J Mathematische Annalen
%D 1991
%P 111-124
%V 289
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MAN_1991__289_4_164771/
%F MAN_1991__289_4_164771