@article{ITA_1983__17_1_13_0,
     author = {Ehrenfeucht, A. and Rozenberg, G.},
     title = {On the separating power of {EOL} systems},
     journal = {RAIRO. Informatique th\'eorique},
     pages = {13--22},
     publisher = {EDP-Sciences},
     volume = {17},
     number = {1},
     year = {1983},
     mrnumber = {701985},
     zbl = {0512.68059},
     language = {en},
     url = {http://www.numdam.org/item/ITA_1983__17_1_13_0/}
}