@article{PMFA_1956_1_2_a9,
     author = {Fok, V. A.},
     title = {Homogennost, kovariantnost a relativnost v theorii prostoru a \v{c}asu},
     journal = {Pokroky matematiky, fyziky a astronomie},
     pages = {197--201},
     year = {1956},
     volume = {1},
     number = {2},
     language = {cs},
     url = {http://geodesic.mathdoc.fr/item/PMFA_1956_1_2_a9/}
}