Fadlan, Andi, et al. “Landslide Surface Prediction With Combined HVSR and VES Geophysical Techniques: Case Study in Semarang City, Indonesia”. International Journal of Hydrological and Environmental for Sustainability, vol. 3, no. 2, Aug. 2024, pp. 65-73, https://doi.org/10.58524/ijhes.v3i2.442.