@article{KYB_1969_5_4_a0,
     author = {Rovan, Branislav},
     title = {Bounded push down automata},
     journal = {Kybernetika},
     pages = {261--265},
     year = {1969},
     volume = {5},
     number = {4},
     mrnumber = {0247961},
     zbl = {0184.28501},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/KYB_1969_5_4_a0/}
}