Alizadeh Beromi, Mahdi, Afshar Kazemi, Mohammad Ali, Keramati, Mohammadali, Toloie Ashlaghi, Abbass. Designing an Optimal Recycling Model in a Four-Level Closed-Loop Supply Chain by Queuing Theory and ‎Robust Planning 
(Case Study: Paper Industry).  Journal of Strategic Management in Industrial Systems. 2023;18(65):91-115. doi:10.30495/imj.2023.1993565.1867