Anggraeni, Dwi, et al. “Identification of Subsurface Structures Using Topex Altimetry Satellite Gravity Data: Implications for Preliminary Surveys of Geothermal Existence”. International Journal of Hydrological and Environmental for Sustainability, vol. 2, no. 2, July 2023, pp. 88-96, https://doi.org/10.58524/ijhes.v2i2.261.