TY  - JOUR
AU  - W. Ballmann
AU  - G. Thorbergsson
TI  - Some existence theorems for closed geodesics.
JO  - Commentarii mathematici Helvetici
PY  - 1983
SP  - 416
EP  - 432
VL  - 58
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/CMH_1983__58_139948/
ID  - CMH_1983__58_139948
ER  -