MRUCZEK-NASIENIEWSKA, K.; NASIENIEWSKI, M. Logics with Impossibility as the Negation and Regular Extensions of the Deontic Logic D2. Bulletin of the Section of Logic, [S. l.], v. 46, n. 3/4, p. 263–282, 2017. DOI: 10.18778/0138-0680.46.3.4.06. Disponível em: https://www.czasopisma.uni.lodz.pl/bulletin/article/view/3259. Acesso em: 3 may. 2024.