@article{ITA_1977__11_4_273_0,
     author = {Ehrenfeucht, A. and Rozenberg, G.},
     title = {On some context free languages that are not deterministic {ETOL} languages},
     journal = {RAIRO. Informatique th\'eorique},
     pages = {273--291},
     publisher = {Centrale des revues, Dunod-Gauthier-Villars},
     address = {Montreuil},
     volume = {11},
     number = {4},
     year = {1977},
     mrnumber = {483746},
     zbl = {0378.68040},
     language = {en},
     url = {http://archive.numdam.org/item/ITA_1977__11_4_273_0/}
}