@article{UM_2021_29_1_a3,
     author = {Ku\v{r}ina, Franti\v{s}ek and Vondrov\'a, Na\v{d}a},
     title = {Jak to vlastn\v{e} je? {\v{C}{\'\i}sla} a mno\v{z}iny},
     journal = {U\v{c}itel matematiky},
     pages = {46--64},
     year = {2021},
     volume = {29},
     number = {1},
     language = {cs},
     url = {http://geodesic.mathdoc.fr/item/UM_2021_29_1_a3/}
}