@article{UM_2014_22_2_a3,
     author = {Vlk, V\'aclav},
     title = {Jak to vlastn\v{e} je?},
     journal = {U\v{c}itel matematiky},
     pages = {112--118},
     year = {2014},
     volume = {22},
     number = {2},
     language = {cs},
     url = {http://geodesic.mathdoc.fr/item/UM_2014_22_2_a3/}
}