Usworo, Restu Fajar Widi, et al. “Optimization of Maintenance To Minimize Disorders Of CC 203 Locomotive In Daop 2 Bandung”. Jurnal Perkeretaapian Indonesia (Indonesian Railway Journal), vol. 3, no. 2, Dec. 2019, https://doi.org/10.37367/jpi.v3i2.123.