ЗАПУХЛЯК, І. Б. Theoretical and applied aspects of of forming of value chain of gas transportation services in system of support of its competitiveness. 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. 11, p. 10–14, 2015. Disponível em: https://eung.nung.edu.ua/index.php/ecom/article/view/135. Acesso em: 4 may. 2024.