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@article{MZ_1986__191_173698, author = {Victor Bangert}, title = {On the {Lengths} of {Closed} {Geodesics} on {Almost} {Round} {Spheres.}}, journal = {Mathematische Zeitschrift}, pages = {549--558}, publisher = {mathdoc}, volume = {191}, year = {1986}, zbl = {0595.53049}, url = {http://geodesic.mathdoc.fr/item/MZ_1986__191_173698/} }
Victor Bangert. On the Lengths of Closed Geodesics on Almost Round Spheres.. Mathematische Zeitschrift, Tome 191 (1986), pp. 549-558. http://geodesic.mathdoc.fr/item/MZ_1986__191_173698/