%0 Journal Article %A Zhi-Hong Sun %A Kenneth S. Williams %T On the number of representations of $n$ by $ax^2+bxy+cy^2$ %J Acta Arithmetica %D 2006 %P 101-171 %V 122 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/aa122-2-1/ %R 10.4064/aa122-2-1 %G en %F 10_4064_aa122_2_1