@article{UM_1999_7_4_a8,
     author = {Proch\'azka, Franti\v{s}ek},
     title = {Jak na to na {Z\v{S}?}},
     journal = {U\v{c}itel matematiky},
     pages = {255--256},
     year = {1999},
     volume = {7},
     number = {4},
     language = {cs},
     url = {http://geodesic.mathdoc.fr/item/UM_1999_7_4_a8/}
}