РОМАШКО, О. М. Background of diversification of activity of gas transportation enterprises. 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. 2, n. 10, p. 72–81, 2014. Disponível em: https://eung.nung.edu.ua/index.php/ecom/article/view/170. Acesso em: 27 apr. 2024.