%0 Journal Article %A Zhi-Wei Sun %T Mixed sums of squares and triangular numbers %J Acta Arithmetica %D 2007 %P 103-113 %V 127 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/aa127-2-1/ %R 10.4064/aa127-2-1 %G en %F 10_4064_aa127_2_1