Muradov, A., G. Ismailova, and G. Suyundikova. “Effect of Fillers on the Physical and Mechanical Properties of Polyimide Composites”. Recent Contributions to Physics, vol. 2012, no. 4, Dec. 2012, pp. 31-35, https://bph.kaznu.kz/index.php/zhuzhu/article/view/722.