@article{PMFA_2009_54_2_a3,
     author = {Koza, J\'ulius},
     title = {Slnko v roku astron\'omie},
     journal = {Pokroky matematiky, fyziky a astronomie},
     pages = {117--136},
     year = {2009},
     volume = {54},
     number = {2},
     language = {sk},
     url = {http://geodesic.mathdoc.fr/item/PMFA_2009_54_2_a3/}
}