Ahmed El Bakouri1, Laila Elajhar, Douae El Khachine, Khadija El Kharrim, Mohamed Allouza4, Abdelhak Bouabdli, Jamal Chao & Driss Belghyti. “ MOROCCO)”. International Journal of Research Science and Management, vol. 5, no. 6, June 2018, pp. 54-63, http://ijrsm.com/index.php/journal-ijrsm/article/view/318.