@misc{UM_1997_5_3_a12,
     title = {Letn{\'\i} \v{s}kola matematiky pro u\v{c}itele {SOU}},
     journal = {U\v{c}itel matematiky},
     pages = {183},
     year = {1997},
     volume = {5},
     number = {3},
     language = {cs},
     url = {http://geodesic.mathdoc.fr/item/UM_1997_5_3_a12/}
}