SALOMAA, A. MACROS, Iterated Substitution and Lindenmayer AFLs. DAIMI Report Series, [S. l.], v. 2, n. 18, 1973. DOI: 10.7146/dpb.v2i18.6437. Disponível em: https://tidsskrift.dk/daimipb/article/view/6437. Acesso em: 9 may. 2024.