WIDIONO, Alfonsus Ryan; SUHARTONO, Slamet. Kewenangan Pengelolaan Pertambangan Mineral dan Batubara Ditinjau dari Pasal 18a Ayat (2) Undang-Undang Dasar 1945 . Innovative: Journal Of Social Science Research, [S. l.], v. 3, n. 5, p. 719–732, 2023. Disponível em: https://j-innovative.org/index.php/Innovative/article/view/4916. Acesso em: 9 jun. 2026.