For citations:
Stadnyk V.Y., Matviiv R.B., Rudysh M.Ya., Brezvin R.S., Shchepanskyi P.A., Andrievskii B.V. REFRACTIVE PARAMETERS AND BAND ENERGY STRUCTURE OF K2SO4 CRYSTALS DOPED WITH COPPER. Zhurnal Prikladnoii Spektroskopii. 2020;87(1):163-169. (In Russ.)