@article{UM_1992_0_1_a4,
     author = {Hrub\'y, Dag},
     title = {K u\v{c}ebnic{\'\i}m matematiky na gymn\'aziu},
     journal = {U\v{c}itel matematiky},
     pages = {9--10},
     year = {1992},
     volume = {0},
     number = {1},
     language = {cs},
     url = {http://geodesic.mathdoc.fr/item/UM_1992_0_1_a4/}
}