%0 Journal Article
%A V. Schroeder
%A M.T. Anderson
%T Existence of flats in manifolds of nonpositive curvature.
%J Inventiones mathematicae
%D 1986
%P 303-316
%V 85
%I mathdoc
%U http://geodesic.mathdoc.fr/item/IM_1986__85_143370/
%F IM_1986__85_143370