Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{PORMA_1963__22_4_114908, author = {Samelson, Hans}, title = {On manifolds with many closed geodesics}, journal = {Portugaliae mathematica}, pages = {193--196}, publisher = {mathdoc}, volume = {22}, number = {4}, year = {1963}, mrnumber = {0230256}, zbl = {0134.17704}, language = {en}, url = {http://geodesic.mathdoc.fr/item/PORMA_1963__22_4_114908/} }
Samelson, Hans. On manifolds with many closed geodesics. Portugaliae mathematica, Tome 22 (1963) no. 4, pp. 193-196. http://geodesic.mathdoc.fr/item/PORMA_1963__22_4_114908/