@article{ITA_1979__13_1_49_0,
     author = {Fachini, E. and Maggiolo-Schettini, A.},
     title = {A hierarchy of primitive recursive sequence functions},
     journal = {RAIRO. Informatique th\'eorique},
     pages = {49--67},
     publisher = {EDP-Sciences},
     volume = {13},
     number = {1},
     year = {1979},
     mrnumber = {525457},
     zbl = {0402.03041},
     language = {en},
     url = {http://archive.numdam.org/item/ITA_1979__13_1_49_0/}
}