@article{MZ_1979__169_172884,
     author = {Wolfgang Krieger},
     title = {On the {Periodic} {Points} of {Topological} {Markov} {Chains.}},
     journal = {Mathematische Zeitschrift},
     pages = {99--104},
     publisher = {mathdoc},
     volume = {169},
     year = {1979},
     zbl = {0432.54035},
     url = {http://geodesic.mathdoc.fr/item/MZ_1979__169_172884/}
}