"The Effect of Adding Alumina Phases (alpha and amorphous) to Improve the Mechanical Properties (Compressive Strength and Hardness) of Polyester Matrix Composites", J. eng. sustain. dev., م 18, عدد 6, ص 202–211, 2014, تاريخ الوصول: 19 مايو، 2024. [مباشر على الإنترنت]. موجود في: https://jeasd.uomustansiriyah.edu.iq/index.php/jeasd/article/view/931