Utama, P. P.; Pratomo, S. U.; Haty, I. P.; Yoni, D. R.; Afrilita, A.; Pambudi, S. Rare Earth Elements (REEs) Potential in Active Geothermal Systems: A Global Review and Regional Study at Mount Slamet, Indonesia. Eksplorium: Bul. Pus. Bang. BGN 2025, 46, 15-26.