@article{1183530198, author = {Shub, Michael}, title = {Periodic orbits of hyperbolic diffeomorphisms and flows}, journal = {Bull. Amer. Math. Soc.}, volume = {75}, number = {5}, year = {1969}, pages = { 57-58}, language = {en}, url = {http://dml.mathdoc.fr/item/1183530198} }
Shub, Michael. Periodic orbits of hyperbolic diffeomorphisms and flows. Bull. Amer. Math. Soc., Tome 75 (1969) no. 5, pp. 57-58. http://gdmltest.u-ga.fr/item/1183530198/