%0 Journal Article
%A Min Chen
%T Differentiability and rigidity theorems
%J Annales Fennici Mathematici
%D 2002
%P 221-230
%V 27
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/AFM_2002_27_1_a17/
%G en
%F AFM_2002_27_1_a17