@article{PMFA_1958__3_1_a9,
     author = {Kopeck\'y, Miloslav},
     title = {Periodicita slune\v{c}n{\'\i} \v{c}innosti},
     journal = {Pokroky matematiky, fyziky a astronomie},
     pages = {66--80},
     publisher = {mathdoc},
     volume = {03},
     number = {1},
     year = {1958},
     language = {cz},
     url = {http://geodesic.mathdoc.fr/item/PMFA_1958__3_1_a9/}
}