EPSTEIN, Richard L. Reflections on temporal and modal logic. Logic and Logical Philosophy, [S. l.], v. 24, n. 1, p. 111–139, 2014. DOI: 10.12775/LLP.2014.015. Disponível em: https://apcz.umk.pl/LLP/article/view/LLP.2014.015. Acesso em: 8 jul. 2025.