@article{UM_1998_6_3_a10,
     author = {Charv\'at, Jura},
     title = {D\v{r}{\'\i}ve $P$, dnes $K$?},
     journal = {U\v{c}itel matematiky},
     pages = {187--190},
     year = {1998},
     volume = {6},
     number = {3},
     language = {cs},
     url = {http://geodesic.mathdoc.fr/item/UM_1998_6_3_a10/}
}