AL-MATAR, Najeeb; TADJ, Lotfi. On a Closed-Loop Supply Chain with Graded Returns. Statistics, Optimization & Information Computing, [S. l.], v. 11, n. 2, p. 531–540, 2023. DOI: 10.19139/soic-2310-5070-1758. Disponível em: https://iapress.org/index.php/soic/article/view/1758. Acesso em: 24 may. 2026.