JONES, Neil D.; SKYUM, Sven. Upper Bounds on the Complexity of Some Problems Concerning L Systems. DAIMI Report Series, [S. l.], v. 6, n. 69, 1977. DOI: 10.7146/dpb.v6i69.6487. Disponível em: https://tidsskrift.dk/daimipb/article/view/6487. Acesso em: 5 feb. 2026.