@misc{KYB_1975_11_4_a6,
     title = {Zpr\'avy},
     journal = {Kybernetika},
     pages = {315--317},
     year = {1975},
     volume = {11},
     number = {4},
     language = {cs},
     url = {http://geodesic.mathdoc.fr/item/KYB_1975_11_4_a6/}
}