@article{CMH_1961__35_139215,
     author = {R. Olivier},
     title = {Die {Existenz} geschlossener {Geod\"atischer} auf kompakten {Mannigfaltigkeiten.}},
     journal = {Commentarii mathematici Helvetici},
     pages = {146--152},
     publisher = {mathdoc},
     volume = {35},
     year = {1961},
     zbl = {0138.43002},
     url = {http://geodesic.mathdoc.fr/item/CMH_1961__35_139215/}
}