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2. S. L. Kramer, Geotechnical Earthquake Engineering, (United States: Prentice-Hall, Inc., 1996).
3. Ministry of Energy and Mineral Resources, Atlas Zona Kerentanan Likuefaksi Nasional (Bandung: Geological Agency, 2019).
4. Lapindo Brantas and Schlumberger, Banjar Panji 1 data audit montage: Technical report, reprinted in Lupi et al. (2014).
5. The East Java mud volcano (2006 to present): An earthquake or drilling trigger?