%0 Journal Article
%A Chang, Sun-Yung A.
%A Gursky, Matthew J.
%A Yang, Paul C.
%T A conformally invariant sphere theorem in four dimensions
%J Publications Mathématiques de l'IHÉS
%D 2003
%P 105-143
%V 98
%I Springer
%U http://www.numdam.org/articles/10.1007/s10240-003-0017-z/
%R 10.1007/s10240-003-0017-z
%G en
%F PMIHES_2003__98__105_0