@misc{10_21136_CPMF_1917_123716,
     title = {\'Ulohy},
     journal = {\v{C}asopis pro p\v{e}stov\'an{\'\i} matematiky a fysiky},
     pages = {106--112},
     year = {1917},
     volume = {46},
     number = {1},
     doi = {10.21136/CPMF.1917.123716},
     language = {cs},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CPMF.1917.123716/}
}