MEREZHKO Н., TERNOVA А., and SIRENKO С. “allpoint en arket in kraine”. "INTERNATIONAL·SCIENTIFIC-·PRACTICAL·JOURNAL·COMMODITIES·AND·MARKETS", vol. 24, no. 2, Dec. 2017, pp. 96-103, https://journals.knute.edu.ua/commodities-and-markets/article/view/1187.