JENSEN, K.; KYNG, M.; MADSEN, O. L. A Petri Net Definition of a System Description Language. DAIMI Report Series, [S. l.], v. 8, n. 96, 1981. DOI: 10.7146/dpb.v8i96.6512. Disponível em: https://tidsskrift.dk/daimipb/article/view/6512. Acesso em: 9 may. 2024.