A. SAHAYA SUDHA; K. R. VIJAYALAKSHMI. Arithmetic Operations of Hexagonal Intuitionistic Fuzzy Number Using Extension Principle. International Journal of Mathematics And its Applications, [S. l.], v. 6, n. 2 - A, p. 219–225, 2018. Disponível em: https://ijmaa.in/index.php/ijmaa/article/view/666. Acesso em: 3 jul. 2024.