KOZACHENKO, Nadiia P. Modelling of AGM-style doxastic operations in three-valued setting. CTE Workshop Proceedings, Kryvyi Rih, Ukraine, v. 10, p. 326–345, 2023. DOI: 10.55056/cte.553. Disponível em: https://acnsci.org/journal/index.php/cte/article/view/553.. Acesso em: 19 may. 2026.