@article{PMFA_1973_18_5_a4,
     author = {Kowalski, Old\v{r}ich},
     title = {Ohl\'ednut{\'\i} za {Pokroky}},
     journal = {Pokroky matematiky, fyziky a astronomie},
     pages = {281--284},
     year = {1973},
     volume = {18},
     number = {5},
     language = {cs},
     url = {http://geodesic.mathdoc.fr/item/PMFA_1973_18_5_a4/}
}