@article{ZNSL_1982_115_a5,
     author = {A. M. Vershik},
     title = {A theorem on the {Markov} periodic approximation in ergodic theory},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {72--82},
     publisher = {mathdoc},
     volume = {115},
     year = {1982},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1982_115_a5/}
}