@article{PMFA_1959_4_1_a16,
     author = {\v{S}klovskij, I. S. and \v{S}\v{c}eglov, P. V.},
     title = {Optick\'a pozorov\'an{\'\i} um\v{e}l\'ych dru\v{z}ic {Zem\v{e}}},
     journal = {Pokroky matematiky, fyziky a astronomie},
     pages = {90--96},
     year = {1959},
     volume = {4},
     number = {1},
     language = {cs},
     url = {http://geodesic.mathdoc.fr/item/PMFA_1959_4_1_a16/}
}