@article{UM_1999__7_1_a1,
     author = {Hrub\'y, Dag},
     title = {Surdick\'e v\'yrazy},
     journal = {U\v{c}itel matematiky},
     pages = {9--13},
     publisher = {mathdoc},
     volume = {07},
     number = {1},
     year = {1999},
     language = {cz},
     url = {http://geodesic.mathdoc.fr/item/UM_1999__7_1_a1/}
}