ROBLES, G.; MÉNDEZ, J. M. Converse Ackermann property and constructive negation defined with a negation connective. Logic and Logical Philosophy, [S. l.], v. 15, n. 2, p. 113–130, 2006. DOI: 10.12775/LLP.2006.007. Disponível em: https://apcz.umk.pl/LLP/article/view/LLP.2006.007. Acesso em: 28 mar. 2024.