R. Irzon, H. Syaeful, A. Kusworo, J. Wahyudiono, and Ngadenin, “Review on Granitic Rocks in Sumatra: Intrusion Process, Classification, Mineralization, and Potential Uses”, Eksplorium: Bul. Pus. Bang. BGN, vol. 43, no. 1, pp. 1–12, May 2022.