“DESAIN PELEDAKAN OPTIMAL TAMBANG BAWAH TANAH METODE UNDERHAND CUT AND FILL: Teknik Pertambangan Universitas Muhammadiyah Maluku Utara”. DINTEK, vol. 1, no. 1, Oct. 2017, pp. 6-15, https://jurnal.ummu.ac.id/index.php/dintek/article/view/10.