%0 Journal Article
%A J. Cassels
%T On the representation of rational functions as sums of squares
%J Acta Arithmetica
%D 1964
%P 79-82
%V 9
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/articles/10.4064/aa-9-1-79-82/
%R 10.4064/aa-9-1-79-82
%G en
%F 10_4064_aa_9_1_79_82