%0 Journal Article %A Jian-Shu Li %T Singular unitary representations of classical groups. %J Inventiones mathematicae %D 1989 %P 237-256 %V 97 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/IM_1989__97_2_143701/ %F IM_1989__97_2_143701