G. M. Jamal, H. i. Jafaar, and N. N. Rammo, “Studying the Effect of Volume Fraction Variation and Environmental in Creep Behavior of Polyester Resin Composed With Fiber E-Glass(Mat) and Carbon Black Powder Particles”, SJUOZ, vol. 1, no. 1, pp. 388–404, Jun. 2013, Accessed: Nov. 17, 2025. [Online]. Available: https://sjuoz.uoz.edu.krd/index.php/sjuoz/article/view/141