Rizal Arifin, Devi Intan Silviani, Rakhma Ayu Giarti, and Daril Ridho Zuchrillah. “Techno-Economic Analysis of Fuel Switching from Coal to Natural Gas for NPK Fertilizer Drying Process”. IPTEK The Journal of Engineering 12, no. 1 (August 11, 2026): 59–77. Accessed August 14, 2026. https://journal.its.ac.id/index.php/joe/article/view/9573.