@misc{KYB_1967_3_2_a9,
     title = {Zpr\'avy},
     journal = {Kybernetika},
     pages = {213--217},
     year = {1967},
     volume = {3},
     number = {2},
     language = {cs},
     url = {http://geodesic.mathdoc.fr/item/KYB_1967_3_2_a9/}
}