VOLKOV, V.; HOROSHKOVA, L.; KHLOBYSTOV, Y. Development of export and import operations in the coal mining industry. Visnyk of Taras Shevchenko National University of Kyiv. Geology, [S. l.], v. 1, n. 88, p. 69–75, 2020. DOI: 10.17721/1728-2713.88.10. Disponível em: https://geology.bulletin.knu.ua/en/article/view/1181. Acesso em: 11 oct. 2026.