CISMAWAN, Arif Deswanda; IBRAHIM, Eddy; SUTRIYONO, Eddy; TOHA, M. Taufik; YUSUF, Maulana; PUTRA, Rahmat Wahyudi. Sensitivity of Coal Reserve Economic Feasibility to Price Fluctuations: A Case Study of an Open-Pit Coal Mine in East Kalimantan, Indonesia. International Journal of Engineering Continuity, [S. l.], v. 5, n. 1, p. 197–218, 2026. DOI: 10.58291/ijec.v5i1.547. Disponível em: https://ejournal.sultanpublisher.com/ijec/article/view/547. Acesso em: 5 jun. 2026.