Subarudi S, Kartodihardjo H, Soedomo S, Sapardi H, Muttaqin MZ. Analysing Policy Formulation for Coal Mining Activities within State Forest Zone in Indonesia: A case study of East Kalimantan Province. IJSBAR. 2016;26(1):314-330. Accessed November 4, 2025. https://www.gssrr.org/JournalOfBasicAndApplied/article/view/5425