RASKIN, L.; SIRA, O. Execution of arithmetic operations involving the second-order fuzzy numbers. Eastern-European Journal of Enterprise Technologies, [S. l.], v. 4, n. 4 (106), p. 14–20, 2020. DOI: 10.15587/1729-4061.2020.210103. Disponível em: https://journals.uran.ua/eejet/article/view/210103. Acesso em: 17 aug. 2024.