@article{PMFA_1956__1_4_a12,
     author = {Langhans, Kurt},
     title = {M\v{e}\v{r}en{\'\i} z\'a\v{r}en{\'\i}},
     journal = {Pokroky matematiky, fyziky a astronomie},
     pages = {420--421},
     publisher = {mathdoc},
     volume = {01},
     number = {4},
     year = {1956},
     language = {cz},
     url = {http://geodesic.mathdoc.fr/item/PMFA_1956__1_4_a12/}
}