@misc{PMFA_1960_5_1_a9,
     title = {O n\v{e}kter\'ych probl\'emech kosmick\'ych let\r{u}},
     journal = {Pokroky matematiky, fyziky a astronomie},
     pages = {84--93},
     year = {1960},
     volume = {5},
     number = {1},
     language = {cs},
     url = {http://geodesic.mathdoc.fr/item/PMFA_1960_5_1_a9/}
}