%0 Journal Article
%A W. Ballmann
%A G. Thorbergsson
%T Some existence theorems for closed geodesics.
%J Commentarii mathematici Helvetici
%D 1983
%P 416-432
%V 58
%I mathdoc
%U http://geodesic.mathdoc.fr/item/CMH_1983__58_139948/
%F CMH_1983__58_139948