@article{PMFA_1995_40_6_a3,
     author = {Halmos, Paul R.},
     title = {Co je to u\v{c}it?},
     journal = {Pokroky matematiky, fyziky a astronomie},
     pages = {324--330},
     year = {1995},
     volume = {40},
     number = {6},
     language = {cs},
     url = {http://geodesic.mathdoc.fr/item/PMFA_1995_40_6_a3/}
}