@misc{10_21136_CPMF_1919_121298,
     title = {\'Ulohy},
     journal = {\v{C}asopis pro p\v{e}stov\'an{\'\i} matematiky a fysiky},
     publisher = {mathdoc},
     volume = {48},
     number = {3-4},
     year = {1919},
     doi = {10.21136/CPMF.1919.121298},
     language = {cz},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CPMF.1919.121298/}
}