@article{UM_1997_5_1_a9,
     author = {Kup\v{c}\'akov\'a, Marie},
     title = {Tajemn\'e kruhov\'e \'ukazy o\v{c}ima geometra},
     journal = {U\v{c}itel matematiky},
     pages = {41--46},
     year = {1997},
     volume = {5},
     number = {1},
     language = {cs},
     url = {http://geodesic.mathdoc.fr/item/UM_1997_5_1_a9/}
}