Building initial models for full-waveform inversion of shallow targets by surface waves dispersion curves clustering and data transform D. Teodor, C. Comina, F. K. Anjom, L. V. Socco, J. Virieux, P. -t. Trinh, R. Brossier (2019) Building initial models for full-waveform inversion of shallow targets by surface waves dispersion curves clustering and data transform