MÉNDEZ, J. M. A Routley-Meyer semantics for Ackermann’s logics of “strenge implication”. Logic and Logical Philosophy, [S. l.], v. 18, n. 3-4, p. 191–219, 2010. DOI: 10.12775/LLP.2009.010. Disponível em: https://apcz.umk.pl/LLP/article/view/LLP.2009.010. Acesso em: 27 apr. 2024.