“Analisis Efisiensi Operasi Boiler Berdasarkan Produksi Fly Ash dan Bottom Ash Menggunakan Metode Data Envelopment Analysis Di PT. XYZ”. Journal of Industrial Innovation and Safety Engineering (JINSENG) 3, no. `1 (Juni 1, 2026): 28–37. Diakses November 2, 2026. https://journal.itk.ac.id/index.php/jinseng/article/view/8481975.