BLOOM, S. L.; ÉSIK, Z. Axiomatizing Omega and Omega-op Powers of Words. BRICS Report Series, [S. l.], v. 9, n. 41, 2002. DOI: 10.7146/brics.v9i41.21756. Disponível em: https://tidsskrift.dk/brics/article/view/21756. Acesso em: 28 apr. 2024.