%0 Journal Article
%A Belegradek, Igor
%A Kapovitch, Vitali
%T Obstructions to nonnegative curvature and rational homotopy theory
%J Journal of the American Mathematical Society
%D 2003
%P 259-284
%V 16
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/articles/10.1090/S0894-0347-02-00418-6/
%R 10.1090/S0894-0347-02-00418-6
%F 10_1090_S0894_0347_02_00418_6