@article{PMFA_1981_26_4_a0,
     author = {Kalvoda, Jan},
     title = {V\'yvoj vesm{\'\i}ru ve vztahu k historii {Zem\v{e}}},
     journal = {Pokroky matematiky, fyziky a astronomie},
     pages = {181--192},
     year = {1981},
     volume = {26},
     number = {4},
     language = {cs},
     url = {http://geodesic.mathdoc.fr/item/PMFA_1981_26_4_a0/}
}