MAMEDOVA, Muattar, et al. “TOSHKENT VILOYATI OHANGARON SANOAT HUDUDI TUPROG‘I TARKIBIDAGI OG‘IR METALLARNI HAMDA CR IONINI MASS-SPEKTROMETRIK USULDA ANIQLASH”. «ACTA NUUz», vol. 3, no. 3.2.1, Dec. 2025, pp. 437-9, http://journals.nuu.uz/index.php/actanuuz/article/view/10054.