Source: https://www.researchgate.net/profile/Alexandre-Sellier/publication/326557195_IMPACT_DU_SOL_SUR_L'IMPEDANCE_TRANSITOIRE_D'UNE_PRISE_DE_TERRE_APPROCHE_EXPERIMENTALE_ET_NUMERIQUE/links/5b55dd6ba6fdcc8dae3d6e3d/IMPACT-DU-SOL-SUR-LIMPEDANCE-TRANSITOIRE-DUNE-PRISE-DE-TERRE-APPROCHE-EXPERIMENTALE-ET-NUMERIQUE.pdf