@article{UM_2000_8_3_a3,
     author = {Calda, Emil},
     title = {O podivuhodn\'em {\quotedblbase}odvozen{\'\i}‟ n\v{e}kter\'ych vzorc\r{u}},
     journal = {U\v{c}itel matematiky},
     pages = {149--151},
     year = {2000},
     volume = {8},
     number = {3},
     language = {cs},
     url = {http://geodesic.mathdoc.fr/item/UM_2000_8_3_a3/}
}