%0 Journal Article %A Ping Xu %T The evaluation of two-dimensional lattice sums via Ramanujan's theta functions %J Acta Arithmetica %D 2014 %P 57-89 %V 165 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/aa165-1-4/ %R 10.4064/aa165-1-4 %G en %F 10_4064_aa165_1_4