@article{UM_2005_13_1_a2,
     author = {Beran, Ladislav},
     title = {O line\'arn{\'\i} z\'avislosti},
     journal = {U\v{c}itel matematiky},
     pages = {20--25},
     year = {2005},
     volume = {13},
     number = {1},
     language = {cs},
     url = {http://geodesic.mathdoc.fr/item/UM_2005_13_1_a2/}
}