@misc{RMF_2012_87_3_a6,
     title = {54. ro\v{c}n{\'\i}k {Fyzik\'aln{\'\i}} olympi\'ady, \'ulohy 1. kola},
     journal = {Rozhledy matematicko-fyzik\'aln{\'\i}},
     pages = {30--47},
     year = {2012},
     volume = {87},
     number = {3},
     language = {cs},
     url = {http://geodesic.mathdoc.fr/item/RMF_2012_87_3_a6/}
}