%0 Journal Article %A Juan A. Tirao %T On the centralizer of K in the universal enveloping algebra of SO(n,1) and SU(n,1). %J Manuscripta mathematica %D 1994 %P 119-140 %V 85 %N 3-4 %I mathdoc %U http://geodesic.mathdoc.fr/item/MM2_1994__85_3-4_156013/ %F MM2_1994__85_3-4_156013