@misc{PMFA_1972_17_3_a6,
     title = {Meta olympi\'ada},
     journal = {Pokroky matematiky, fyziky a astronomie},
     pages = {159},
     year = {1972},
     volume = {17},
     number = {3},
     language = {cs},
     url = {http://geodesic.mathdoc.fr/item/PMFA_1972_17_3_a6/}
}