@article{CMUC_1967_8_1_a10,
     author = {Frol{\'\i}k, Zden\v{e}k},
     title = {On two problems of {W.} {W.} {Comfort}},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
     pages = {139--144},
     year = {1967},
     volume = {8},
     number = {1},
     mrnumber = {0210071},
     zbl = {0162.26502},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMUC_1967_8_1_a10/}
}