STANDEFER, Shawn. Varieties of Relevant S5. Logic and Logical Philosophy, [S. l.], v. 32, n. 1, p. 53–80, 2022. DOI: 10.12775/LLP.2022.011. Disponível em: https://apcz.umk.pl/LLP/article/view/32974. Acesso em: 8 jul. 2025.