@article{UM_1993_1_2_a17,
     author = {Proch\'azka, F.},
     title = {Letn{\'\i} \v{s}kola pro u\v{c}itele matematiky {SO\v{S}} v {Chrudimi}},
     journal = {U\v{c}itel matematiky},
     pages = {53},
     year = {1993},
     volume = {1},
     number = {2},
     language = {cs},
     url = {http://geodesic.mathdoc.fr/item/UM_1993_1_2_a17/}
}