@article{PMFA_2022_67_1_a4,
     author = {Novotn\'y, Jan},
     title = {John {D.} {Barrow} o probl\'emu svobodn\'e v\r{u}le},
     journal = {Pokroky matematiky, fyziky a astronomie},
     pages = {45--50},
     year = {2022},
     volume = {67},
     number = {1},
     language = {cs},
     url = {http://geodesic.mathdoc.fr/item/PMFA_2022_67_1_a4/}
}