@article{10_21136_CPM_1966_117551,
     author = {Pond\v{e}l{\'\i}\v{c}ek, Bed\v{r}ich},
     title = {O charakterech pologrup, jejich\v{z} idempotenty tvo\v{r}{\'\i} \v{r}et\v{e}zec},
     journal = {\v{C}asopis pro p\v{e}stov\'an{\'\i} matematiky},
     pages = {4--7},
     publisher = {mathdoc},
     volume = {091},
     number = {1},
     year = {1966},
     doi = {10.21136/CPM.1966.117551},
     mrnumber = {0197602},
     zbl = {0143.03501},
     language = {cs},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CPM.1966.117551/}
}