@article{RMF_2006_81_2_a9,
     author = {T\"opfer, Pavel},
     title = {\'Ust\v{r}edn{\'\i} kolo 55. ro\v{c}n{\'\i}ku {Matematick\'e} olympi\'ady, kategorie {P}},
     journal = {Rozhledy matematicko-fyzik\'aln{\'\i}},
     pages = {48--50},
     year = {2006},
     volume = {81},
     number = {2},
     language = {cs},
     url = {http://geodesic.mathdoc.fr/item/RMF_2006_81_2_a9/}
}