T. KOOCHAKPOOR. Fuzzy Hyper Pseudo BCK-Ideals of Hyper Pseudo BCK-Algebras. Jordan Journal of Mathematics and Statistics, [S. l.], v. 15, n. 3A, p. 381–398, 2025. Disponível em: https://jjms.yu.edu.jo/index.php/jjms/article/view/723. Acesso em: 18 aug. 2025.