Voir la notice de l'article provenant de la source Math-Net.Ru
@article{FAA_1967_1_1_a6, author = {A. B. Katok}, title = {Entropy and approximations of dynamical systems by periodic transformations}, journal = {Funkcionalʹnyj analiz i ego prilo\v{z}eni\^a}, pages = {75--85}, publisher = {mathdoc}, volume = {1}, number = {1}, year = {1967}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/FAA_1967_1_1_a6/} }
A. B. Katok. Entropy and approximations of dynamical systems by periodic transformations. Funkcionalʹnyj analiz i ego priloženiâ, Tome 1 (1967) no. 1, pp. 75-85. http://geodesic.mathdoc.fr/item/FAA_1967_1_1_a6/