Z. Kovalyuk, V. . Netyaga, M. Pyrlya, R. Potsiluiko, and V. Boledzyuk, “The Effect of the Thermal Introduction of NaNO2 on the Optical Properties of Indium and Gallium Monoselenides”, Phys. Chem. Sol. State, vol. 17, no. 4, pp. 544–547, Dec. 2016.