A. K. DUTTA; D. K. BASNET; K. D. CHOUDHURY; S. R. BARBHUIYA. Generalized Doubt Fuzzy Structure of $BG$-algebra. International Journal of Mathematics And its Applications, [S. l.], v. 5, n. 3 - A, p. 91–104, 2017. Disponível em: https://ijmaa.in/index.php/ijmaa/article/view/852. Acesso em: 22 jul. 2024.