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@article{DAN_1966_171_6_a6, author = {A. B. Katok and A. M. Stepin}, title = {Approximation of ergodic dynamical systems by periodic transformations}, journal = {Doklady Akademii Nauk}, pages = {1268--1271}, publisher = {mathdoc}, volume = {171}, number = {6}, year = {1966}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1966_171_6_a6/} }
A. B. Katok; A. M. Stepin. Approximation of ergodic dynamical systems by periodic transformations. Doklady Akademii Nauk, Tome 171 (1966) no. 6, pp. 1268-1271. http://geodesic.mathdoc.fr/item/DAN_1966_171_6_a6/