Widiono, Alfonsus Ryan, and Slamet Suhartono. “ Kewenangan Pengelolaan Pertambangan Mineral Dan Batubara Ditinjau Dari Pasal 18a Ayat (2) Undang-Undang Dasar 1945 ”. Innovative: Journal Of Social Science Research 3, no. 5 (October 7, 2023): 719–732. Accessed June 9, 2026. https://j-innovative.org/index.php/Innovative/article/view/4916.