Kaka, Diyar, Roma A. Fatah, Parzhin Gharib, and Ahmad Mustafa. “Mechanical Properties of Polyester Toughened With Nano-Silica”. Iraqi Journal of Industrial Research 8, no. 3 (December 14, 2021): 61–68. Accessed April 26, 2024. http://ijoir.gov.iq/ijoir/index.php/jou/article/view/67.