%0 Journal Article
%A Blekherman, Grigoriy
%T Nonnegative polynomials and sums of squares
%J Journal of the American Mathematical Society
%D 2012
%P 617-635
%V 25
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/articles/10.1090/S0894-0347-2012-00733-4/
%R 10.1090/S0894-0347-2012-00733-4
%F 10_1090_S0894_0347_2012_00733_4