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• Hafezalkotob.Ashkan Determining the Optimum Investment Portfolios in the Iranian Banking Network Base on Bi-level Game using the Markowitz Optimization Model by Firefly Algorithm [ Vol.6, Issue 3 - Summer Year 2021]
• Heydari.Mohammad Ali Designing an Incorporated Multi-Objective Green Supply Chain- Work Cost Model under non- Definitive Conditions [ Vol.6, Issue 1 - Winter Year 2021]