@misc{PMFA_1963_8_4_a9,
     title = {Zaj{\'\i}mavosti z v\v{e}dy a techniky},
     journal = {Pokroky matematiky, fyziky a astronomie},
     pages = {246--247},
     year = {1963},
     volume = {8},
     number = {4},
     language = {cs},
     url = {http://geodesic.mathdoc.fr/item/PMFA_1963_8_4_a9/}
}