Ciko, Muhammad Hadziqul Afkar, and Sumiati Sumiati. “Optimization of Phoska Fertilizer Production Planning Using Dynamic Programming Method”. Journal La Multiapp 6, no. 5 (October 6, 2025): 1280-1291. Accessed May 9, 2026. https://www.newinera.com/index.php/JournalLaMultiapp/article/view/2213.