@article{KYB_1973_9_6_a8,
     author = {Gruska, Jozef},
     title = {Correction to: {{\textquotedblleft}On} star height hierarchies of context-free languages{\textquotedblright}},
     journal = {Kybernetika},
     pages = {519},
     year = {1973},
     volume = {9},
     number = {6},
     mrnumber = {0434001},
     zbl = {0273.68053},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/KYB_1973_9_6_a8/}
}