@misc{RMF_2015_90_1-2_a13,
     title = {56. ro\v{c}n{\'\i}k {Fyzik\'aln{\'\i}} olympi\'ady, \'ulohy \v{s}koln{\'\i}ho kola},
     journal = {Rozhledy matematicko-fyzik\'aln{\'\i}},
     pages = {107--112},
     year = {2015},
     volume = {90},
     number = {1-2},
     language = {cs},
     url = {http://geodesic.mathdoc.fr/item/RMF_2015_90_1-2_a13/}
}