Source: https://www.researchgate.net/profile/Iboukhoulef-Hamida-2/publication/279226286_Influence_du_carbonate_de_sodium_anhydre_sur_l'extraction_de_l'huile_a_partir_d'un_grignon_d'olive_humide/links/5c6e6ec4a6fdcc404ec216c0/Influence-du-carbonate-de-sodium-anhydre-sur-lextraction-de-lhuile-a-partir-dun-grignon-dolive-humide.pdf