@article{ITA_1982__16_3_245_0,
     author = {P\u{a}un, Gheorghe},
     title = {On simple matrix languages versus scattered context languages},
     journal = {RAIRO. Informatique th\'eorique},
     pages = {245--253},
     publisher = {EDP-Sciences},
     volume = {16},
     number = {3},
     year = {1982},
     mrnumber = {686915},
     zbl = {0505.68034},
     language = {en},
     url = {http://www.numdam.org/item/ITA_1982__16_3_245_0/}
}