Yurchenko, Oleg I., E. N. Takhtaulova, Tetiana V. Chernozhuk, and Mikhail A. Dobriyan. 2012. “Standard Composition Sample for the Detection of Silver in the Jewelry Products”. V. N. Karazin Kharkiv National University Bulletin. Chemical Series, no. 21 (December), 224-28. https://doi.org/10.26565/2220-637X-2012-21-22.