V. A. Lototskaya and L. F. Yakovenko, Relaxation of the mechanical properties of polyimide films of the kapton H type during long-term exposure at ambient conditions , Low Temp. Phys. 49, 1222–1228, (2023) [Fiz. Nyzk. Temp. 49, 1346–1353, (2023)] DOI: https://doi.org/10.1063/10.0021365.