@article{10_4064_cm_52_1_99_103,
     author = {Wojciech Bartoszek},
     title = {"Zero-two'' law for conservative {Markov} operators},
     journal = {Colloquium Mathematicum},
     pages = {99--103},
     publisher = {mathdoc},
     volume = {52},
     number = {1},
     year = {1987},
     doi = {10.4064/cm-52-1-99-103},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/cm-52-1-99-103/}
}