%0 Journal Article
%A G. Harder
%T Eisenstein cohomology of arithmetic groups. The case GL2.
%J Inventiones mathematicae
%D 1987
%P 37-118
%V 89
%I mathdoc
%U http://geodesic.mathdoc.fr/item/IM_1987__89_143473/
%F IM_1987__89_143473