@article{RMF_2007_82_3_a8,
     author = {\v{S}vr\v{c}ek, Jaroslav},
     title = {\'Ust\v{r}edn{\'\i} kolo 56. ro\v{c}n{\'\i}ku {Matematick\'e} olympi\'ady},
     journal = {Rozhledy matematicko-fyzik\'aln{\'\i}},
     pages = {53--56},
     year = {2007},
     volume = {82},
     number = {3},
     language = {cs},
     url = {http://geodesic.mathdoc.fr/item/RMF_2007_82_3_a8/}
}