@misc{KYB_1989_25_1_a7,
     title = {Zpr\'avy},
     journal = {Kybernetika},
     pages = {69--70},
     year = {1989},
     volume = {25},
     number = {1},
     language = {cs},
     url = {http://geodesic.mathdoc.fr/item/KYB_1989_25_1_a7/}
}