@article{GDZPPN002332760,
title = {Metrics with only finitely many isometry invariant geodesics.},
journal = {Mathematische Annalen},
volume = {283},
year = {1989},
pages = {391-408},
zbl = {0653.53027},
url = {http://dml.mathdoc.fr/item/GDZPPN002332760}
}
Rademacher, Hans-Bert. Metrics with only finitely many isometry invariant geodesics.. Mathematische Annalen, Tome 283 (1989) pp. 391-408. http://gdmltest.u-ga.fr/item/GDZPPN002332760/