%0 Journal Article %A Jing-song Huang %T Intertwining differential operators and reducibility of generalized Verma modules. %J Mathematische Annalen %D 1993 %P 309-324 %V 297 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/MAN_1993__297_3_165134/ %F MAN_1993__297_3_165134