Mohamed م. إ. س. Publishing Rules and Table of Contents: Volume 21- No.2- August 2017. University of Aden Journal of Natural and Applied Sciences, [S. l.], v. 21, n. 2, p. I-XI, 2017. Disponível em: https://uajnas.adenuniv.com/index.php/uajnas/article/view/245. Acesso em: 4 apr. 2025.