Suparman, Yasa, Afnimar Afnimar, and Devy Kamil Syahbana. “The Drop of Relative Velocity Variation and Coherence Values Prior to Sinabung 2013 Eruptions”. Indonesian Journal on Geoscience 8, no. 1 (March 9, 2021): 109–117. Accessed April 3, 2025. https://ijog.geologi.esdm.go.id/index.php/IJOG/article/view/530.