MULTI-FUZZY SET RELATIONAL STRUCTURES. FUDMA JOURNAL OF SCIENCES, [S. l.], v. 4, n. 1, p. 662–667, 2020. Disponível em: http://www.fjsadmin.fudutsinma.edu.ng/index.php/fjs/article/view/96. Acesso em: 12 sep. 2025.