@article{PMFA_1987_32_2_a2,
     author = {Drbohlav, Karel},
     title = {Algebra, logika a teorie mno\v{z}in},
     journal = {Pokroky matematiky, fyziky a astronomie},
     pages = {78--85},
     year = {1987},
     volume = {32},
     number = {2},
     mrnumber = {0891389},
     zbl = {0622.01029},
     language = {cs},
     url = {http://geodesic.mathdoc.fr/item/PMFA_1987_32_2_a2/}
}