Source: https://www.researchgate.net/profile/P-Eberhard/publication/45420657_Contribution_du_champ_electrique_des_noyaux_a_la_diffusion_elastique_des_g_du_60Co/links/54dd503a0cf28a3d93f8ca5a/Contribution-du-champ-electrique-des-noyaux-a-la-diffusion-elastique-des-g-du-60Co.pdf