Approximate Solution for Systems of Fuzzy Differential Equations by Variational Iteration Method. Punjab University Journal of Mathematics, [S. l.], v. 51, n. 8, p. 13–33, 2025. Disponível em: https://pujm.pu.edu.pk/index.php/pujm/article/view/469. Acesso em: 29 jun. 2025.