@article{PMFA_2004_49_1_a7,
     author = {Horsk\'y, Jan and \v{S}tefan{\'\i}k, Milan},
     title = {Vzta\v{z}n\'e syst\'emy v~astronomii},
     journal = {Pokroky matematiky, fyziky a astronomie},
     pages = {60--64},
     year = {2004},
     volume = {49},
     number = {1},
     language = {cs},
     url = {http://geodesic.mathdoc.fr/item/PMFA_2004_49_1_a7/}
}