%0 Journal Article %A Yiu, Paul Y. H. %T Sums of Squares Formulae With Integer Coefficients %J Canadian mathematical bulletin %D 1987 %P 318-324 %V 30 %N 3 %U http://geodesic.mathdoc.fr/articles/10.4153/CMB-1987-045-6/ %R 10.4153/CMB-1987-045-6 %F 10_4153_CMB_1987_045_6