@article{UM_1993_1_2_a16,
     author = {Hrub\'y, D.},
     title = {Semin\'a\v{r} pro ni\v{z}\v{s}{\'\i} gymn\'azia},
     journal = {U\v{c}itel matematiky},
     pages = {52--53},
     year = {1993},
     volume = {1},
     number = {2},
     language = {cs},
     url = {http://geodesic.mathdoc.fr/item/UM_1993_1_2_a16/}
}