%0 Journal Article %A Detlev Poguntke %T Operators of Finite Rank in Unitary Representations of Exponential Lie Groups. %J Mathematische Annalen %D 1982 %P 371-384 %V 259 %I mathdoc %U http://geodesic.mathdoc.fr/item/MAN_1982__259_163640/ %F MAN_1982__259_163640