%0 Journal Article
%A A. Schinzel
%T On Sums of Four Coprime Squares
%J Bulletin of the Polish Academy of Sciences. Mathematics
%D 2013
%P 109-111
%V 61
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/articles/10.4064/ba61-2-3/
%R 10.4064/ba61-2-3
%G en
%F 10_4064_ba61_2_3