@article{KYB_1974_10_4_a0,
     author = {Havel, Ivan M.},
     title = {Finite branching automata},
     journal = {Kybernetika},
     pages = {281--302},
     year = {1974},
     volume = {10},
     number = {4},
     mrnumber = {0381383},
     zbl = {0287.94050},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/KYB_1974_10_4_a0/}
}