Zamrah, Ade, and Boy Nurdin. “Problems of Upstream and Downstream Integration of Rare Earth Metals in the National Mining Legal System”. Journal Customary Law 3, no. 3.1 (June 30, 2026): 1–10. Accessed July 6, 2026. https://journal.pubmedia.id/index.php/jcl/article/view/5872.