NIELSEN, Mogens; ROZENBERG, Grzegorz; SALOMAA, Arto; SKYUM, Sven. Nonterminals, Homomorphisms, and Codings in Different Variations of 0L-Systems. DAIMI Report Series, [S. l.], v. 3, n. 21, 1974. DOI: 10.7146/dpb.v3i21.6440. Disponível em: https://tidsskrift.dk/daimipb/article/view/6440. Acesso em: 26 dec. 2025.