@article{PMFA_1960_5_4_a3,
     author = {Koutsk\'y, Karel},
     title = {O element\'arn{\'\i} matematice},
     journal = {Pokroky matematiky, fyziky a astronomie},
     pages = {395--398},
     year = {1960},
     volume = {5},
     number = {4},
     zbl = {0098.00207},
     language = {cs},
     url = {http://geodesic.mathdoc.fr/item/PMFA_1960_5_4_a3/}
}