PIETRUSZCZAK, Andrzej. The consequence relation preserving logical information. Logic and Logical Philosophy, [S. l.], v. 13, n. 13, p. 89–120, 2004. DOI: 10.12775/LLP.2004.006. Disponível em: https://apcz.umk.pl/LLP/article/view/LLP.2004.006. Acesso em: 8 jul. 2025.