@article{KYB_1979__15_2_a4,
     author = {Pik, Ji\v{r}{\'\i}},
     title = {A note on connections between {0L-languages} and context-free languages},
     journal = {Kybernetika},
     pages = {--140},
     publisher = {mathdoc},
     volume = {15},
     number = {2},
     year = {1979},
     mrnumber = {542058},
     zbl = {0415.68038},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/KYB_1979__15_2_a4/}
}