ПОБІГУН, С. А. Analysis of functioning environmental of oil and gas enterprises based on econometric support. 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. 54–59, 2015. Disponível em: https://eung.nung.edu.ua/index.php/ecom/article/view/142. Acesso em: 23 apr. 2024.