@misc{KYB_1968_4_6_a5,
     title = {Book {Reviews}},
     journal = {Kybernetika},
     pages = {591--593},
     year = {1968},
     volume = {4},
     number = {6},
     language = {sk},
     url = {http://geodesic.mathdoc.fr/item/KYB_1968_4_6_a5/}
}