@misc{PMFA_1972_17_3_a4,
     title = {P\v{r}edsjezdov\'a diskuse},
     journal = {Pokroky matematiky, fyziky a astronomie},
     pages = {147--152},
     year = {1972},
     volume = {17},
     number = {3},
     language = {cs},
     url = {http://geodesic.mathdoc.fr/item/PMFA_1972_17_3_a4/}
}