@article{PMFA_2009_54_1_a2,
     author = {Olivov\'a, Jana},
     title = {St\'ale z\'ahadn\'e \v{c}ern\'e d{\'\i}ry},
     journal = {Pokroky matematiky, fyziky a astronomie},
     pages = {15--22},
     year = {2009},
     volume = {54},
     number = {1},
     language = {cs},
     url = {http://geodesic.mathdoc.fr/item/PMFA_2009_54_1_a2/}
}