Nonterminals, Homomorphisms and Codings in Different Variations of OL-Systems. I. Deterministic Systems

Mogens Nielsen Grzegorz Rozenberg Arto Salomaa Sven Skyum Nonterminals, Homomorphisms and Codings in Different Variations of OL-Systems. I. Deterministic Systems Acta Inf. 4 1974 87-106 db/journals/acta/acta4.html#NielsenRSS74a