@article{PMFA_2015_60_1_a6,
     author = {Ku\v{r}ina, Franti\v{s}ek},
     title = {Povrch je derivac{\'\i} objemu},
     journal = {Pokroky matematiky, fyziky a astronomie},
     pages = {75--79},
     year = {2015},
     volume = {60},
     number = {1},
     language = {cs},
     url = {http://geodesic.mathdoc.fr/item/PMFA_2015_60_1_a6/}
}