ZHMUD, Boris, Bogdan PASALSKIY, and СHYKUN Nadiia. 2013. “anomaterials in ubricants”. NTERNATIONAL CIENTIFIC-RACTICAL OURNAL OMMODITIES ND ARKETS 15 (1):131-37. https://journals.knute.edu.ua/commodities-and-markets/article/view/1334.