Source: https://www.researchgate.net/profile/Rochdi-Atmane/publication/358232170_3e_edition_national_des_Journees_Doctorales_'Sciences_et_Techniques'_FST_Errachidia/links/61f7391caad5781d41bf82e9/3e-edition-national-des-Journees-Doctorales-Sciences-et-Techniques-FST-Errachidia.pdf