@article{UM_2006__14_4_a7,
     author = {Calda, Emil},
     title = {Jedna nev\'ychovn\'a \'uloha, kterou si \v{c}ten\'a\v{r} snadno vy\v{r}e\v{s}{\'\i}},
     journal = {U\v{c}itel matematiky},
     pages = {254--255},
     publisher = {mathdoc},
     volume = {14},
     number = {4},
     year = {2006},
     language = {cz},
     url = {http://geodesic.mathdoc.fr/item/UM_2006__14_4_a7/}
}