%0 Journal Article
%A J. W. S. Cassels
%T On sums of squares
%J Informatics and Automation
%D 1973
%P 114-117
%V 132
%I mathdoc
%U http://geodesic.mathdoc.fr/item/TRSPY_1973_132_a14/
%G ru
%F TRSPY_1973_132_a14