%0 Journal Article
%A Grove, Karsten
%A Petersen, Peter
%T A pinching theorem for homotopy spheres
%J Journal of the American Mathematical Society
%D 1990
%P 671-677
%V 03
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/articles/10.1090/S0894-0347-1990-1049696-6/
%R 10.1090/S0894-0347-1990-1049696-6
%F 10_1090_S0894_0347_1990_1049696_6