@misc{UM_1994_2_3_a23,
     title = {Co pro v\'as p\v{r}ipravujeme},
     journal = {U\v{c}itel matematiky},
     pages = {59--64},
     year = {1994},
     volume = {2},
     number = {3},
     language = {cs},
     url = {http://geodesic.mathdoc.fr/item/UM_1994_2_3_a23/}
}