@misc{KYB_1970__6_6_a9,
     title = {Zpr\'avy},
     journal = {Kybernetika},
     pages = {502--505},
     publisher = {mathdoc},
     volume = {06},
     number = {6},
     year = {1970},
     language = {cz},
     url = {http://geodesic.mathdoc.fr/item/KYB_1970__6_6_a9/}
}