@misc{UM_1993_1_1_a24,
     title = {Matematick\'e znaky},
     journal = {U\v{c}itel matematiky},
     pages = {49--50},
     year = {1993},
     volume = {1},
     number = {1},
     language = {cs},
     url = {http://geodesic.mathdoc.fr/item/UM_1993_1_1_a24/}
}