TKACZYK, M. A formal theory of physical necessity. Logic and Logical Philosophy, [S. l.], v. 16, n. 1, p. 65–83, 2007. DOI: 10.12775/LLP.2007.003. Disponível em: https://apcz.umk.pl/LLP/article/view/LLP.2007.003. Acesso em: 25 jul. 2024.