@article{PMFA_1981__26_5_a1,
     author = {Folta, Jaroslav},
     title = {Zamy\v{s}len{\'\i} nad bolzanovsk\'ymi v\'yro\v{c}{\'\i}mi},
     journal = {Pokroky matematiky, fyziky a astronomie},
     pages = {241--248},
     publisher = {mathdoc},
     volume = {26},
     number = {5},
     year = {1981},
     language = {cz},
     url = {http://geodesic.mathdoc.fr/item/PMFA_1981__26_5_a1/}
}