SEMEEIN, S. B. Chained fuzzy modules. Ibn AL-Haitham Journal For Pure and Applied Sciences, Baghdad, Iraq., v. 23, n. 2, p. 175–183, 2017. Disponível em: https://jih.uobaghdad.edu.iq/index.php/j/article/view/909.. Acesso em: 14 aug. 2024.