@article{UM_1995_3_3_a2,
     author = {Hejn\'y, Milan and Koman, Milan},
     title = {T\v{r}i b\v{e}\v{z}ci a t\v{r}i hlem\'y\v{z}di},
     journal = {U\v{c}itel matematiky},
     pages = {12--13},
     year = {1995},
     volume = {3},
     number = {3},
     language = {cs},
     url = {http://geodesic.mathdoc.fr/item/UM_1995_3_3_a2/}
}