@article{KYB_1970_6_5_a1,
     author = {Thierrin, Gabriel},
     title = {Simple automata},
     journal = {Kybernetika},
     pages = {343--350},
     year = {1970},
     volume = {6},
     number = {5},
     mrnumber = {0280299},
     zbl = {0206.28804},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/KYB_1970_6_5_a1/}
}