%0 Journal Article
%A Alfredo Brega
%A Juan Tirao
%T K-Invariants in the universal enveloping algebra of the Desitter Group.
%J Manuscripta mathematica
%D 1987
%P 1-36
%V 58
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MM2_1987__58_155208/
%F MM2_1987__58_155208