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2. M. P. Hochstein and S. Sudarman. Indonesian Volcanic Geothermal System (Proceedings World Geothermal Congress, 19-25 April 2015), pp. 1–4.
3. H. Muraoka, T. Takahashi, H. Sundhoro, S. Dwipa, Y. Soeda, M. Momita, and K. Shimada. Geothermal systems contrained by the Sumatran fault and its pull-apart basin in Sumatra, Western Indonosia (Proc. World Geothermal Congress. Bali, Indonesia, 2010), pp. 2–8.
4. D. H. Natawidjaja. Updating active fault maps and sliprates along the Sumatran fault zone Indonesia (Conf. Series: Earth and Environmental Science, 2017), pp. 2–10.
5. History of geothermal exploration in Indonesia from 1970 to 2000