%0 Journal Article
%A Madonia, M.
%A Salemi, S.
%A Sportelli, T.
%T On $z$-submonoids and $z$-codes
%J RAIRO - Theoretical Informatics and Applications - Informatique Théorique et Applications
%D 1991
%P 305-322
%V 25
%N 4
%I EDP-Sciences
%U http://www.numdam.org/item/ITA_1991__25_4_305_0/
%G en
%F ITA_1991__25_4_305_0