@article{KYB_1966_2_4_a2,
     author = {Kop\v{r}iva, Ji\v{r}{\'\i}},
     title = {Generalization of well-translation of formal languages},
     journal = {Kybernetika},
     pages = {305--313},
     year = {1966},
     volume = {2},
     number = {4},
     zbl = {0154.41804},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/KYB_1966_2_4_a2/}
}