%0 Journal Article
%A Bernhard Leeb
%T 3-manifolds with(out) metrics of nonpositive curvature.
%J Inventiones mathematicae
%D 1995
%P 277-290
%V 122
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/item/IM_1995__122_3_144321/
%F IM_1995__122_3_144321