@article{KYB_1989_25_3_a3,
     author = {Vajda, Igor},
     title = {About optimum signalling of information},
     journal = {Kybernetika},
     pages = {175--199},
     year = {1989},
     volume = {25},
     number = {3},
     mrnumber = {1010181},
     zbl = {0676.94005},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/KYB_1989_25_3_a3/}
}