@article{CMUC_1980__21_4_a2,
     author = {Frol{\'\i}k, Zden\v{e}k and Holick\'y, Petr},
     title = {Selections using orderings (non-separable case)},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
     pages = {653--661},
     publisher = {mathdoc},
     volume = {21},
     number = {4},
     year = {1980},
     mrnumber = {597756},
     zbl = {0459.28008},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMUC_1980__21_4_a2/}
}