@misc{UM_2009_17_4_a5,
     title = {Matematick\'a olympi\'ada},
     journal = {U\v{c}itel matematiky},
     pages = {238--253},
     year = {2009},
     volume = {17},
     number = {4},
     language = {cs},
     url = {http://geodesic.mathdoc.fr/item/UM_2009_17_4_a5/}
}