%0 Journal Article %A D. P. Zhelobenko %T Extremal projectors and generalized Mickelsson algebras over reductive Lie algebras %J Izvestiya. Mathematics %D 1989 %P 85-100 %V 33 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/IM2_1989_33_1_a3/ %G en %F IM2_1989_33_1_a3