@misc{KYB_1981_17_2_a10,
     title = {Zpr\'avy},
     journal = {Kybernetika},
     pages = {189--190},
     year = {1981},
     volume = {17},
     number = {2},
     language = {cs},
     url = {http://geodesic.mathdoc.fr/item/KYB_1981_17_2_a10/}
}