%0 Journal Article
%A D.M. Jr. Burns
%A C.L. Epstein
%T A global invariant for three dimensional CR-manifolds.
%J Inventiones mathematicae
%D 1988
%P 333-348
%V 92
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/IM_1988__92_1_143570/
%F IM_1988__92_1_143570