%0 Journal Article %A Vepkhvadze, T. %T Modular properties of theta-functions and representation of numbers by positive quadratic forms. %J Georgian Mathematical Journal %D 1997 %P 385-400 %V 4 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/GMJ_1997__4_4_47768/ %G en %F GMJ_1997__4_4_47768