@article{10_4064_ap_48_1_65_70,
     author = {Antoni Leon Dawidowicz and Andrzej Turski},
     title = {A simple proof of a theorem on {Markov} operators},
     journal = {Annales Polonici Mathematici},
     pages = {65--70},
     publisher = {mathdoc},
     volume = {48},
     number = {1},
     year = {1988},
     doi = {10.4064/ap-48-1-65-70},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/ap-48-1-65-70/}
}