Kupchishin, A.I., and M.N. Niyazov. “Study of the Dependence of Relative Elongation on Mechanical Stress of Polyvinyl Chloride Films”. Recent Contributions to Physics 90, no. 3 (September 17, 2024): 64–69. Accessed September 4, 2026. https://bph.kaznu.kz/index.php/zhuzhu/article/view/1781.