@article{MAN_1989__284_4_164560,
     author = {Hans-Bert Rademacher},
     title = {Metrics with only finitely many isometry invariant geodesics.},
     journal = {Mathematische Annalen},
     pages = {391--408},
     publisher = {mathdoc},
     volume = {284},
     number = {4},
     year = {1989},
     zbl = {0653.53027},
     url = {http://geodesic.mathdoc.fr/item/MAN_1989__284_4_164560/}
}