Sulaimonov Khusanboy Mannopovich, and Rakhmonov Tohirbek imomalievich. “OPTICAL PROPERTIES OF POLYCRYSTALLINE PbSe FILMS IN THE IR RANGE OF THE SPECTRUM”. International Engineering Journal For Research & Development, vol. 6, no. 5, Nov. 2021, p. 4, doi:10.17605/OSF.IO/EB9GM.