Pratama, Rizky, Agung Widarman, and Haris Sandi Yudha. “Reassessing EOQ-Based Brown Clay Inventory Control for NPK Fertilizer Production: Model Validation and Scenario Analysis”. BRIDGE : The Multidisciplinary Research Portal 4, no. 1 (January 31, 2026): 382–393. Accessed August 30, 2026. https://jurnal.sttnlampung.ac.id/index.php/bridge/article/view/197.