KLARLUND, N. A Homomorphism Concept for omega-Regularity. BRICS Report Series, [S. l.], v. 1, n. 11, 1994. DOI: 10.7146/brics.v1i11.21659. Disponível em: https://tidsskrift.dk/brics/article/view/21659. Acesso em: 2 may. 2024.