S. PRAVEENA; M. KAMARAJ. Some New Results on Bipolar-Valued Fuzzy d-Algebras. International Journal of Mathematics And its Applications, [S. l.], v. 6, n. 4, p. 65–73, 2018. Disponível em: https://ijmaa.in/index.php/ijmaa/article/view/328. Acesso em: 3 jul. 2024.