@article{UM_2017__25_3_a0,
     author = {Janda, David and Pilous, Derek},
     title = {Grafy funkc{\'\i} z pohledu \v{z}\'ak\r{u} a student\r{u} z\'akladn{\'\i}ch, st\v{r}edn{\'\i}ch a vysok\'ych \v{s}kol},
     journal = {U\v{c}itel matematiky},
     pages = {129--155},
     publisher = {mathdoc},
     volume = {25},
     number = {3},
     year = {2017},
     language = {cz},
     url = {http://geodesic.mathdoc.fr/item/UM_2017__25_3_a0/}
}