ГРЕЧАНИК, Б. В. Natural Monopolies: Problems of Functioning and Reorganazation in the Context of Development of Oil and Gas Industry. 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. 14, p. 52–58, 2018. Disponível em: https://eung.nung.edu.ua/index.php/ecom/article/view/28. Acesso em: 7 may. 2024.