Ichsan, Anggito Setya, et al. “Life Cycle Assessment of Heavy Equipment Repair and Hazardous Waste Storage: Environmental Optimization at a Coal Mining Contractor”. Agroindustrial Technology Journal, vol. 9, no. 2, Nov. 2025, pp. 69-90, https://atj.journal.unida.gontor.ac.id/index.php/atj/article/view/7.