@article{SM_1995_186_10_a6,
     author = {S. V. Savchenko},
     title = {Periodic points of denumerable topological {Markov} chains},
     journal = {Sbornik. Mathematics},
     pages = {1493--1529},
     publisher = {mathdoc},
     volume = {186},
     number = {10},
     year = {1995},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1995_186_10_a6/}
}