YEFIMENKO, S., and M. REVA. “CHOICE OF THE METHOD OF MATRIX REGISTRATION IN THE X-RAY RADIOMETRY ANALYSES OF NON-FERROUS METALS”. Visnyk of Taras Shevchenko National University of Kyiv. Geology, no. 51, Jan. 2025, pp. 4-8, https://geology.bulletin.knu.ua/en/article/view/2190.