Yudiantoro, DF., DR. Ratnaningsih, P. Pratiknyo, Mahreni Mahreni, DS. Sayudi, I. Paramitahaty, H. Hamdalah, et al. 2022. “Hydrothermal Fluids-Rock Interactions in the Geothermal Area of the Ngebel Volcano Complex Ponorogo, East Java, Indonesia”. RSF Conference Series: Engineering and Technology 1 (1):267-80. https://doi.org/10.31098/cset.v1i1.378.