Ramazanov, Vladyslav. 2020. “Evaluation of the Efficiency of the Diversification Mechanism Gas Supply to Ukraine in the Reverse Direction”. Science Journal «Economics and Region», no. 2(77) (July). Poltava: PNTU, 16-24. https://doi.org/https://doi.org/10.26906/EiR.2020.2(77).1942.