@article{DAN_1975_223_4_a3,
     author = {A. B. Katok},
     title = {Time change, monotone equivalent and standard dynamical systems},
     journal = {Doklady Akademii Nauk},
     pages = {789--792},
     publisher = {mathdoc},
     volume = {223},
     number = {4},
     year = {1975},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1975_223_4_a3/}
}