%0 Journal Article %A Don Zagier %T Periods of modular forms and Jacobi theta functions. %J Inventiones mathematicae %D 1991 %P 449-466 %V 104 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/IM_1991__104_1_143891/ %F IM_1991__104_1_143891