Pramatadie, A. M., H. Yamanaka, and A. Afnimar. “Shallow S-Wave Velocity Profile Estimation Using Surface Velocity and Microtremor HVSR With a Linear Velocity Increase Approach”. Journal of Mathematical and Fundamental Sciences, vol. 54, no. 3, July 2023, pp. 330-58, doi:10.5614/j.math.fund.sci.2023.54.3.4.