@misc{RMF_2008_83_4_a6,
     title = {50. ro\v{c}n{\'\i}k {Fyzik\'aln{\'\i}} olympi\'ady, \'ulohy kategori{\'\i} {E} a {F}},
     journal = {Rozhledy matematicko-fyzik\'aln{\'\i}},
     pages = {41--47},
     year = {2008},
     volume = {83},
     number = {4},
     language = {cs},
     url = {http://geodesic.mathdoc.fr/item/RMF_2008_83_4_a6/}
}