@article{UM_2012_20_1_a4,
     author = {Ku\v{r}ina, Franti\v{s}ek},
     title = {Ekvivalence (\v{c}. j.) nebo ekvivalence (\v{c}. mn.)?},
     journal = {U\v{c}itel matematiky},
     pages = {30--32},
     year = {2012},
     volume = {20},
     number = {1},
     language = {cs},
     url = {http://geodesic.mathdoc.fr/item/UM_2012_20_1_a4/}
}