TY  - JOUR
AU  - Belegradek, Igor
AU  - Kapovitch, Vitali
TI  - Obstructions to nonnegative curvature and rational homotopy theory
JO  - Journal of the American Mathematical Society
PY  - 2003
SP  - 259
EP  - 284
VL  - 16
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.1090/S0894-0347-02-00418-6/
DO  - 10.1090/S0894-0347-02-00418-6
ID  - 10_1090_S0894_0347_02_00418_6
ER  -