Suparman, Yasa, E. Kriswati, and Y. E. Pamitro. “Mechanism of High Frequency Shallow Earthquake Source in Mount Soputan, North Sulawesi”. Indonesian Journal on Geoscience 6, no. 3 (September 28, 2011): 135–144. Accessed February 6, 2025. https://ijog.geologi.esdm.go.id/index.php/IJOG/article/view/122.