@article{ITA_1985__19_1_43_0,
     author = {Ehrenfeucht, A. and Rozenberg, G.},
     title = {Strong iterative pairs and the regularity of context-free languages},
     journal = {RAIRO. Informatique th\'eorique},
     pages = {43--56},
     publisher = {EDP-Sciences},
     volume = {19},
     number = {1},
     year = {1985},
     mrnumber = {795771},
     zbl = {0601.68053},
     language = {en},
     url = {http://www.numdam.org/item/ITA_1985__19_1_43_0/}
}