@article{UM_1998__6_4_a8,
     author = {Li\v{s}kov\'a, Hana},
     title = {Hrav\'a soum\v{e}rnost},
     journal = {U\v{c}itel matematiky},
     pages = {241--244},
     publisher = {mathdoc},
     volume = {06},
     number = {4},
     year = {1998},
     language = {cz},
     url = {http://geodesic.mathdoc.fr/item/UM_1998__6_4_a8/}
}