Stages of Formation of Oil and Gas Industry in Ukraine. Ekon. čas. Volins. nac. unìv. ìm. Lesì Ukraïnki [Internet]. 2017 Mar. 28 [cited 2024 May 3];1(9):76-81. Available from: https://echas.vnu.edu.ua/index.php/echas/article/view/134