Mohamed إ. س. Volume 27- No. 2- October 2023. University of Aden Journal of Natural and Applied Sciences, [S. l.], v. 27, n. 2, p. I-X, 2023. Disponível em: https://uajnas.adenuniv.com/index.php/uajnas/article/view/382. Acesso em: 9 may. 2024.