List of Articles multi-objective mathematical model Open Access Article Abstract Page Full-Text 1 - Designing a Multi-Objective Mathematical Model to Locate Four-Echelon Supply Chain Using Meta-Heuristic Algorithms hamid Reza Mohammadi Reza Ehtesham Rasi Ali Mohtashami Open Access Article Abstract Page Full-Text 2 - Presenting a multi-objective mathematical model of multi-product and multi-stage fuzzy production planning for several periods in Gamz software Aslan Doosti saeid Rezaie Moghadam saeid Rezaie Moghadam 10.30495/imj.2022.691476 Open Access Article Abstract Page Full-Text 3 - Fuzzy interactive programming to design a multi-objective multi-product mathematical model, a multi-stage multi-cycle integrated production program in an inverse supply chain under uncertainty conditions Aslan Doosti Saeid Rezaie Moghadam Open Access Article Abstract Page Full-Text 4 - Solving the multi-objective mathematical model of online load balancing in the production line with the Hybrid method of genetic algorithm and ant lion Nima Rahmani Alireza Irajpour Naser Hamidi Akbar Alam Tabriz Reza Ehtesham Rasi