@article{MZ_1981__176_183646,
     author = {Wilhelm Klingenberg},
     title = {On the {Existence} of {Closed} {Geodesics} on {Spherical} {Manifolds.}},
     journal = {Mathematische Zeitschrift},
     pages = {319--326},
     publisher = {mathdoc},
     volume = {176},
     year = {1981},
     zbl = {0469.53042},
     url = {http://geodesic.mathdoc.fr/item/MZ_1981__176_183646/}
}