@article{UM_1999_7_2_a9,
     author = {Hrub\'y, Dag},
     title = {Zaj{\'\i}mav\'e odmocniny},
     journal = {U\v{c}itel matematiky},
     pages = {119--121},
     year = {1999},
     volume = {7},
     number = {2},
     language = {cs},
     url = {http://geodesic.mathdoc.fr/item/UM_1999_7_2_a9/}
}