@article{ITA_1982__16_1_13_0,
     author = {Pinzani, R. and Sprugnoli, R.},
     title = {The separability of formal languages},
     journal = {RAIRO. Informatique th\'eorique},
     pages = {13--31},
     publisher = {EDP-Sciences},
     volume = {16},
     number = {1},
     year = {1982},
     mrnumber = {677653},
     zbl = {0479.68079},
     language = {en},
     url = {http://www.numdam.org/item/ITA_1982__16_1_13_0/}
}