Alfaris, Arif, Muhardono Muhardono, and Azhar Hermawan Ryanto. “Optimizing Train Maintenance to Minimize Maintenance Delays at Balai Yasa Manggarai”. Jurnal Perkeretaapian Indonesia (Indonesian Railway Journal) 3, no. 1 (March 20, 2019): 70–75. Accessed September 8, 2024. https://jurnal.ppi.ac.id/jpi/article/view/74.