@article{RMF_2020_95_3_a4,
     author = {Calda, Emil},
     title = {Permutace s opakov\'an{\'\i}m a rozmis\v{t}ov\'an{\'\i} do p\v{r}ihr\'adek},
     journal = {Rozhledy matematicko-fyzik\'aln{\'\i}},
     pages = {30--32},
     year = {2020},
     volume = {95},
     number = {3},
     language = {cs},
     url = {http://geodesic.mathdoc.fr/item/RMF_2020_95_3_a4/}
}