KOZEN, D. Results on the Propositional µ-Calculus. DAIMI Report Series, [S. l.], v. 11, n. 146, 1982. DOI: 10.7146/dpb.v11i146.7420. Disponível em: https://tidsskrift.dk/daimipb/article/view/7420. Acesso em: 9 may. 2024.