@article{PMFA_1972__17_2_a0,
     author = {P\'at\'y, Libor},
     title = {Jednota dnes a z{\'\i}tra},
     journal = {Pokroky matematiky, fyziky a astronomie},
     pages = {57--60},
     publisher = {mathdoc},
     volume = {17},
     number = {2},
     year = {1972},
     language = {cz},
     url = {http://geodesic.mathdoc.fr/item/PMFA_1972__17_2_a0/}
}