H. JABUR AL OBAIDI, Q. Watery Education. College of Basic Education Research Journal, [S. l.], v. 11, n. 1, p. 340–356, 2012. Disponível em: https://stats.uomosul.edu.iq/index.php/berj/article/view/38262. Acesso em: 26 oct. 2025.