@misc{UM_1993_1_3_a19,
     title = {Ozn\'amen{\'\i} a sd\v{e}len{\'\i}},
     journal = {U\v{c}itel matematiky},
     pages = {54--58},
     year = {1993},
     volume = {1},
     number = {3},
     language = {cs},
     url = {http://geodesic.mathdoc.fr/item/UM_1993_1_3_a19/}
}