@misc{RMF_2014_89_3_a4,
     title = {56. ro\v{c}n{\'\i}k {Fyzik\'aln{\'\i}} olympi\'ady, \'ulohy 1. kola},
     journal = {Rozhledy matematicko-fyzik\'aln{\'\i}},
     pages = {29--45},
     year = {2014},
     volume = {89},
     number = {3},
     language = {cs},
     url = {http://geodesic.mathdoc.fr/item/RMF_2014_89_3_a4/}
}