AHMAD, Muhammad Zaini; HASAN, Mohammad Khatim. A Method of Computing Functions of Trapezoidal Fuzzy Variable and Its Application to Fuzzy Calculus. Journal of Science and Technology, [S. l.], v. 3, n. 2, 2011. Disponível em: https://penerbit.uthm.edu.my/ojs/index.php/JST/article/view/355. Acesso em: 12 mar. 2026.