Sergeev, A. (2018) “KEY ASPECTS OF ECONOMIC EFFICIENCY AND COST OF NATURAL GAS PIPELINE TRANSPORTATION”, Scientific Bulletin of Ivano-Frankivsk National Technical University of Oil and Gas (Series: Economics and Management in the Oil and Gas Industry), 1(7), pp. 36–42. Available at: https://eung.nung.edu.ua/index.php/ecom/article/view/93 (Accessed: 22 December 2024).