TY  - JOUR
AU  - Samelson, Hans
TI  - On manifolds with many closed geodesics
JO  - Portugaliae mathematica
PY  - 1963
SP  - 193
EP  - 196
VL  - 22
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/PORMA_1963__22_4_114908/
LA  - en
ID  - PORMA_1963__22_4_114908
ER  -