Septiawan, Dimas, et al. “Perencanaan Perawatan Preventive Dan Corrective Maintenance Sistem Pelumasan Excavator Caterpillar 305.5E2 Beserta Estimasi Biaya Periode 2024–2026”. RIGGS: Journal of Artificial Intelligence and Digital Business, vol. 5, no. 2, July 2026, pp. 12234-41, doi:10.31004/riggs.v5i2.10607.