JENSEN, K. How to find Invariants for Coloured Petri Nets. DAIMI Report Series, [S. l.], v. 9, n. 120, 1983. DOI: 10.7146/dpb.v9i120.6538. Disponível em: https://tidsskrift.dk/daimipb/article/view/6538. Acesso em: 8 may. 2024.