Taufik, Nilda Tri Putri, and Muhammad Kevin. “Technical Evaluation and Financial Analysis of a Retrofitting Investment Project for Production Machinery in a Cement Plant”. Jurnal Optimasi Sistem Industri 22, no. 2 (December 20, 2023): 215–229. Accessed November 24, 2024. https://josi.ft.unand.ac.id/index.php/josi/article/view/44.