@misc{10_21136_CPMF_1891_121987,
     title = {\'Ulohy},
     journal = {\v{C}asopis pro p\v{e}stov\'an{\'\i} matematiky a fysiky},
     pages = {312--326},
     year = {1891},
     volume = {20},
     number = {6},
     doi = {10.21136/CPMF.1891.121987},
     language = {cs},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CPMF.1891.121987/}
}