Source: https://www.researchgate.net/profile/Philippe-Cosenza/publication/270340126_CARACTERISATION_GEOELECTRIQUE_IN_SITU_DU_COMPACTAGE_DES_SOLS_AGRICOLES_ET_FORESTIERS/links/54a826870cf257a6360bdcda/CARACTERISATION-GEOELECTRIQUE-IN-SITU-DU-COMPACTAGE-DES-SOLS-AGRICOLES-ET-FORESTIERS.pdf