@misc{UM_1993_1_3_a17,
     title = {Redak\v{c}n{\'\i} omyl z \v{c}{\'\i}sla 6 a jeho d\r{u}kaz podan\'y {M.} {Hejn\'ym}},
     journal = {U\v{c}itel matematiky},
     pages = {51},
     year = {1993},
     volume = {1},
     number = {3},
     language = {cs},
     url = {http://geodesic.mathdoc.fr/item/UM_1993_1_3_a17/}
}