%0 Journal Article
%A Joel Langer
%A David A. Singer
%T Diffeomorphisms of the Circle and Geodesic Fields on Riemannian Surfaces of Genus One.
%J Inventiones mathematicae
%D 1982
%P 229-242
%V 69
%I mathdoc
%U http://geodesic.mathdoc.fr/item/IM_1982__69_142950/
%F IM_1982__69_142950