@article{UM_2001_9_1_a12,
     author = {Dittrich, Ji\v{r}{\'\i}},
     title = {Jak a co u\v{c}it v gymnazi\'aln{\'\i} matematice},
     journal = {U\v{c}itel matematiky},
     pages = {62--64},
     year = {2001},
     volume = {9},
     number = {1},
     language = {cs},
     url = {http://geodesic.mathdoc.fr/item/UM_2001_9_1_a12/}
}