%0 Journal Article %A Paul Ponomarev %T Eichler Commutation Relations for Theta Series of Nebentypus. %J Mathematische Annalen %D 1988 %P 691-696 %V 280 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/MAN_1988__280_3_164394/ %F MAN_1988__280_3_164394