GUTS Віктор, IVANYUTA Анастасія, and SYDORENKO Олена. 2014. “orecasting uality of tructure orming ubstances ased on econdary aw aterial of ilver arp”. "INTERNATIONAL·SCIENTIFIC-·PRACTICAL·JOURNAL·COMMODITIES·AND·MARKETS" 18 (2):141-47. https://journals.knute.edu.ua/commodities-and-markets/article/view/1306.