FATIMA, Chehili; LEILA, Boudour; KARIMA, Bouchtab. European Scientific Journal, ESJ, [S. l.], v. 13, n. 9, p. 409, 2017. DOI: 10.19044/esj.2017.v13n9p409. Disponível em: https://last.eujournal.org/index.php/esj/article/view/9035. Acesso em: 12 feb. 2026.