@article{PMFA_1956_1_3_a19,
     author = {Kompan\v{e}jec, A. I.},
     title = {O pojmu s{\'\i}ly ve fysice},
     journal = {Pokroky matematiky, fyziky a astronomie},
     pages = {340--345},
     year = {1956},
     volume = {1},
     number = {3},
     language = {cs},
     url = {http://geodesic.mathdoc.fr/item/PMFA_1956_1_3_a19/}
}