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Continue to ChatSupplier selection and purchase problem for multi-echelon defective supply chain system with stochastic demand - https://avesis.erciyes.edu.tr/yayin/596fdecf-0f1f-4f53-b971-2a51a4be0de3/supplier-selection-and-purchase-problem-for-multi-echelon-defective-supply-chain-system-with-stochastic-demand