@article{UM_1995_3_4_a6,
     author = {Kup\v{c}\'akov\'a, Marie},
     title = {Perspektivn{\'\i} kuk\'atko},
     journal = {U\v{c}itel matematiky},
     pages = {30--32},
     year = {1995},
     volume = {3},
     number = {4},
     language = {cs},
     url = {http://geodesic.mathdoc.fr/item/UM_1995_3_4_a6/}
}