@article{DAN_1969_187_2_a4,
     author = {Yu. A. Davydov},
     title = {The strong mixing property for {Markov} chains with a countable number of states},
     journal = {Doklady Akademii Nauk},
     pages = {252--254},
     publisher = {mathdoc},
     volume = {187},
     number = {2},
     year = {1969},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1969_187_2_a4/}
}