@misc{10_21136_CPMF_1878_122887,
     title = {\'Ulohy},
     journal = {\v{C}asopis pro p\v{e}stov\'an{\'\i} matematiky a fysiky},
     pages = {252--255},
     year = {1878},
     volume = {7},
     number = {4},
     doi = {10.21136/CPMF.1878.122887},
     language = {cs},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CPMF.1878.122887/}
}