@misc{KYB_1984_20_6_a7,
     title = {Zpr\'avy},
     journal = {Kybernetika},
     pages = {505--507},
     year = {1984},
     volume = {20},
     number = {6},
     language = {cs},
     url = {http://geodesic.mathdoc.fr/item/KYB_1984_20_6_a7/}
}