EPSTEIN, Richard L.; BUITRAGO-DÍAZ, Esperanza. A propositional logic of temporal connectives. Logic and Logical Philosophy, [S. l.], v. 24, n. 2, p. 155–200, 2014. DOI: 10.12775/LLP.2014.020. Disponível em: https://apcz.umk.pl/LLP/article/view/LLP.2014.020. Acesso em: 8 mar. 2025.