Dubyna, O., S. Kryvdik, V. Belskyy, and Vyshnevskyi О. “Features of Berillium and Rare Metal Mineralization  in Syenite of the Perga Deposit (Ukrainian Shield)”. Visnyk of Taras Shevchenko National University of Kyiv. Geology 1, no. 88 (March 31, 2020): 92–97. Accessed October 11, 2026. https://geology.bulletin.knu.ua/en/article/view/1187.