%0 Journal Article
%A P. G. Todorov
%T A Representation of a Nonnegative Algebraic Polynomial of Degree Four as a Sum of Two Squares of Real Polynomials
%J Mathematica balkanica
%D 2000
%P 305
%V 14
%N 3-4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MABA_2000_14_3-4_a11/
%F MABA_2000_14_3-4_a11