@article{UM_2014__22_1_a4,
     author = {Vlk, V\'aclav},
     title = {Jak to vlastn\v{e} je?},
     journal = {U\v{c}itel matematiky},
     pages = {51--56},
     publisher = {mathdoc},
     volume = {22},
     number = {1},
     year = {2014},
     language = {cz},
     url = {http://geodesic.mathdoc.fr/item/UM_2014__22_1_a4/}
}