Fuzzy Foldness of BCI-Commutative Ideals in BCI - Algebras. Global Journal of Science Frontier Research, [S. l.], v. 20, n. F4, p. 33–56, 2020. Disponível em: https://www.journalofscience.org/index.php/GJSFR/article/view/2727. Acesso em: 14 aug. 2026.