@article{PMFA_1957__2_4_a4,
     author = {\v{S}afr\'anek, Jaroslav},
     title = {Fysik\'aln{\'\i} \'ustav {University} {Karlovy}},
     journal = {Pokroky matematiky, fyziky a astronomie},
     pages = {412--415},
     publisher = {mathdoc},
     volume = {02},
     number = {4},
     year = {1957},
     language = {cz},
     url = {http://geodesic.mathdoc.fr/item/PMFA_1957__2_4_a4/}
}