Запухляк, І. Б. “Components of the Environment of Functioning and Development of the National 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) 1, no. 9 (September 27, 2014): 55–61. Accessed December 4, 2024. https://eung.nung.edu.ua/index.php/ecom/article/view/191.