ПОЛЯНСЬКА, А. С.; МОРОЗ, Н. В. Potential of Diversification of Sources of Gas Supply in Ukraine: the Real State and Perspectives. Scientific Bulletin of Ivano-Frankivsk National Technical University of Oil and Gas (Series: Economics and Management in the Oil and Gas Industry), [S. l.], v. 1, n. 13, p. 47–56, 2018. Disponível em: https://eung.nung.edu.ua/index.php/ecom/article/view/48. Acesso em: 2 may. 2024.