%0 Journal Article %A K.D. Elworthy %A Steven Rosenberg %T Manifolds with wells of negative curvature (with an Appendix by Daniel Ruberman). %J Inventiones mathematicae %D 1991 %P 471-496 %V 103 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/IM_1991__103_1_143866/ %F IM_1991__103_1_143866