A. Rifandy, “Optimasi Void (Lubang Akhir Tambang) Pada Kegiatan Rencana Pascatambang Batubara di PT. Megaprima Persada Propinsi Kalimantan Timur: Void Optimization (Mining End Hole) in Coal Post Mining Plan Activities at PT. Megaprima Persada East Kalimantan Province”, Media Teknik Lingkungan, vol. 8, no. 1, pp. 09–16, Mar. 2023.