Lubis, Ashar Muda. “Uplift of Kelud Volcano Prior to the November 2007 Eruption As Observed by L-Band Insar”. Journal of Engineering and Technological Sciences 46, no. 3 (September 1, 2014): 245-257. Accessed October 20, 2025. https://journals.itb.ac.id/index.php/jets/article/view/876.