@article{AUPO_1981__20_1_a0,
     author = {Machala, Franti\v{s}ek},
     title = {\"Uber {Mengen} mit {Trennrelationen}},
     journal = {Acta Universitatis Palackianae Olomucensis. Facultas Rerum Naturalium. Mathematica},
     pages = {5--22},
     publisher = {mathdoc},
     volume = {20},
     number = {1},
     year = {1981},
     mrnumber = {0645882},
     zbl = {0478.06001},
     language = {ge},
     url = {http://geodesic.mathdoc.fr/item/AUPO_1981__20_1_a0/}
}