%0 Journal Article
%A Robert J. Zimmer
%T Unitary spectum and the fundamental group for actions of semisimple Lie groups.
%J Mathematische Annalen
%D 1990
%P 697-702
%V 287
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MAN_1990__287_1_164715/
%F MAN_1990__287_1_164715