@article{10_21136_CPMF_1911_122410,
     author = {Jarol{\'\i}mek, V.},
     title = {O ur\v{c}it\'e kongruenci paprskov\'e [4.4]},
     journal = {\v{C}asopis pro p\v{e}stov\'an{\'\i} matematiky a fysiky},
     pages = {152--156},
     year = {1911},
     volume = {40},
     number = {2},
     doi = {10.21136/CPMF.1911.122410},
     language = {cs},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CPMF.1911.122410/}
}