@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/