Pop, M., Studenyak, V., Pogodin, A., Kokhan, O., Suslikov, L., Studenyak, I. and Kúš, P. (2021) “Optical Properties of Cation-Substituted (Cu1 – xAgx)7GeSe5I Mixed Crystals”, Ukrainian Journal of Physics, 66(5), p. 406. doi: 10.15407/ujpe66.5.406.