@article{1183527224, author = {Klingenberg, Wilhelm}, title = {The theorem of the three closed geodesics}, journal = {Bull. Amer. Math. Soc.}, volume = {71}, number = {6}, year = {1965}, pages = { 601-605}, language = {en}, url = {http://dml.mathdoc.fr/item/1183527224} }
Klingenberg, Wilhelm. The theorem of the three closed geodesics. Bull. Amer. Math. Soc., Tome 71 (1965) no. 6, pp. 601-605. http://gdmltest.u-ga.fr/item/1183527224/