@article{UM_2011__19_3_a0,
     author = {Koman, Milan},
     title = {O jedn\'e sedminov\'e a o dvou t\v{r}in\'actinov\'ych roset\'ach},
     journal = {U\v{c}itel matematiky},
     pages = {129--145},
     publisher = {mathdoc},
     volume = {19},
     number = {3},
     year = {2011},
     language = {cz},
     url = {http://geodesic.mathdoc.fr/item/UM_2011__19_3_a0/}
}