@article{PMFA_1960_5_4_a11,
     author = {Ov\v{c}innikov, N. F. and Ujemov, A. I.},
     title = {Plyne prvn{\'\i} {Newton\r{u}v} z\'akon z druh\'eho?},
     journal = {Pokroky matematiky, fyziky a astronomie},
     pages = {468--471},
     year = {1960},
     volume = {5},
     number = {4},
     language = {cs},
     url = {http://geodesic.mathdoc.fr/item/PMFA_1960_5_4_a11/}
}