Completing Codes. - Antonio Restivo; Sergio Salemi; Tecla Sportelli (RAIRO Theor. Informatics Appl., 1989)

On z-submonoids and z-codes. - Marina Madonia; Sergio Salemi; Tecla Sportelli (RAIRO Theor. Informatics Appl., 1991)

A Generalization of Sardinas and Patterson's Algorithm to Z-Codes. - Marina Madonia; Sergio Salemi; Tecla Sportelli (Theor. Comput. Sci., 1993)

Covering Submonoids and Covering Codes. - Maria Madonia; Sergio Salemi; Tecla Sportelli (J. Autom. Lang. Comb., 1999)