@misc{RMF_2011__86_3_a4,
     title = {53. ro\v{c}n{\'\i}k {Fyzik\'aln{\'\i}} olympi\'ady, \'ulohy 1. kola},
     journal = {Rozhledy matematicko-fyzik\'aln{\'\i}},
     pages = {19--37},
     publisher = {mathdoc},
     volume = {86},
     number = {3},
     year = {2011},
     language = {cz},
     url = {http://geodesic.mathdoc.fr/item/RMF_2011__86_3_a4/}
}