%0 Journal Article %A Ja Kyung Koo %T Quotients of Theta Series as Rational Functions of J and ?. %J Mathematische Zeitschrift %D 1989 %P 367-374 %V 202 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/MZ_1989__202_1_174096/ %F MZ_1989__202_1_174096