@article{PMFA_1964_9_1_a3,
     author = {Vy\v{s}{\'\i}n, Vratislav},
     title = {Existuj{\'\i} ve fyzice z\'aporn\'e hmoty a energie?},
     journal = {Pokroky matematiky, fyziky a astronomie},
     pages = {29--40},
     year = {1964},
     volume = {9},
     number = {1},
     language = {cs},
     url = {http://geodesic.mathdoc.fr/item/PMFA_1964_9_1_a3/}
}