“Studying the Mechanical and Electrical Properties of Polyester Resin Reinforced with Silica Particals”, J. eng. sustain. dev., vol. 17, no. 6, pp. 201–214, Dec. 2013, Accessed: Jul. 03, 2024. [Online]. Available: https://jeasd.uomustansiriyah.edu.iq/index.php/jeasd/article/view/1041