RÖNNEDAL, D. Dyadic deontic logic and semantic tableaux. Logic and Logical Philosophy, [S. l.], v. 18, n. 3-4, p. 221–252, 2010. DOI: 10.12775/LLP.2009.011. Disponível em: https://apcz.umk.pl/LLP/article/view/LLP.2009.011. Acesso em: 19 apr. 2024.