N.I. Ostapenko, O.A. Kerita, Yu.V. Ostapenko, and Chursanova М.V., Effect of the polymer ordering on the optical spectra and thermoluminescence of polygermane and polysilane films and nanocomposites, Low Temp. Phys. 45, (2019) [Fiz. Nizk. Temp. 45, 874-880, (2019)] DOI: https://doi.org/10.1063/1.5111302.