@article{1183501760, author = {Hedlund, Gustav A.}, title = {The dynamics of geodesic flows}, journal = {Bull. Amer. Math. Soc.}, volume = {45}, number = {11}, year = {1939}, pages = { 241-260}, language = {en}, url = {http://dml.mathdoc.fr/item/1183501760} }
Hedlund, Gustav A. The dynamics of geodesic flows. Bull. Amer. Math. Soc., Tome 45 (1939) no. 11, pp. 241-260. http://gdmltest.u-ga.fr/item/1183501760/