RÖNNEDAL, D. Temporal Alethic Dyadic Deontic Logic and the Contrary-to-Duty Obligation Paradox. Logic and Logical Philosophy, [S. l.], v. 27, n. 1, p. 3–52, 2017. DOI: 10.12775/LLP.2017.012. Disponível em: https://apcz.umk.pl/LLP/article/view/LLP.2017.012. Acesso em: 18 oct. 2021.