@article{UM_1997_5_2_a3,
     author = {Calda, Emil},
     title = {O jedn\'e zaj{\'\i}mav\'e posloupnosti},
     journal = {U\v{c}itel matematiky},
     pages = {81--82},
     year = {1997},
     volume = {5},
     number = {2},
     language = {cs},
     url = {http://geodesic.mathdoc.fr/item/UM_1997_5_2_a3/}
}