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Purwaningsih B, Setiyowati R, Khurdi NA. A MATHEMATICAL APPROACH OF DUAL CHANNEL SUPPLY CHAIN BY CONSIDERING, CUSTOMER LOYALITY, CORPORATE SOCIAL RESPONSIBILITY, AND DELIVERY TIME. BAREKENG: J. Math. & App. [Internet]. 24Aug.2026 [cited 25Aug.2026];20(4):3305-20. Available from: https://ojs3.unpatti.ac.id/index.php/barekeng/article/view/22393