Кучинская, Л., and Ю. Краснослободцева. “Analysis of Foreign Experience in Order to Improve the Classification of Gemstones in Accordance With GN EAEU”. Bulletin of innovative technologies 6, no. 1 (21) (February 2, 2022): 54-58. Accessed November 14, 2026. https://www.bitjournal.net/index.php/BIT/article/view/240.