Shandra, Iryna. “BALTIC-BLACK SEA ECONOMIC COOPERATION AT THE BEGINNING OF THE 20TH CENTURY: FUEL AND TRANSPORT ASPECTS”. International Relations of Ukraine: Scientific Searches and Findings, no. 34 (December 1, 2025): 167–180. Accessed July 27, 2026. https://mzu.history.org.ua/index.php/MZU/article/view/426.