ETTOUHAMI Mohamed Karim, MERRIMI El Bekkaye,S.BOUREKKADI EL GHARAD Abdellah. 2020. “Effect of Porosity on the Mechanical Properties of Materials”. International Journal of Control and Automation 13 (4), 1349 -52. http://sersc.org/journals/index.php/IJCA/article/view/33868.