@article{10_21136_CPMF_1909_121461,
     author = {Petr, Karel},
     title = {Pozn\'amka ku p\v{r}edch\'azej{\'\i}c{\'\i}mu \v{c}l\'anku},
     journal = {\v{C}asopis pro p\v{e}stov\'an{\'\i} matematiky a fysiky},
     pages = {434--438},
     publisher = {mathdoc},
     volume = {38},
     number = {4},
     year = {1909},
     doi = {10.21136/CPMF.1909.121461},
     language = {cz},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CPMF.1909.121461/}
}