@misc{PMFA_1956_1_4_a4,
     title = {Radioaktivn{\'\i} isotopy v zu\v{s}lech\v{t}ov\'an{\'\i} uhl{\'\i}},
     journal = {Pokroky matematiky, fyziky a astronomie},
     pages = {380--381},
     year = {1956},
     volume = {1},
     number = {4},
     language = {cs},
     url = {http://geodesic.mathdoc.fr/item/PMFA_1956_1_4_a4/}
}