@misc{KYB_1973__9_6_a7,
     title = {Zpr\'avy},
     journal = {Kybernetika},
     pages = {515--518},
     publisher = {mathdoc},
     volume = {09},
     number = {6},
     year = {1973},
     language = {cz},
     url = {http://geodesic.mathdoc.fr/item/KYB_1973__9_6_a7/}
}