TATTON-BROWN, O. W. Semantics and Completeness for Schematic Logic. Logic and Logical Philosophy, [S. l.], v. 30, n. 2, p. 227–280, 2020. DOI: 10.12775/LLP.2020.021. Disponível em: https://apcz.umk.pl/LLP/article/view/LLP.2020.021. Acesso em: 28 nov. 2021.