@article{RMF_2009_84_2_a9,
     author = {Jedin\'ak, Du\v{s}an},
     title = {Cifry, cifry, cifri\v{c}ky ..},
     journal = {Rozhledy matematicko-fyzik\'aln{\'\i}},
     pages = {49--51},
     year = {2009},
     volume = {84},
     number = {2},
     language = {sk},
     url = {http://geodesic.mathdoc.fr/item/RMF_2009_84_2_a9/}
}