Kupchyk, Oleh. “TRADE AND ECONOMIC RELATIONS BETWEEN SOVIET UKRAINE AND GERMANY (EARLY 1920s)”. International Relations of Ukraine: Scientific Searches and Findings, no. 34 (December 1, 2025): 216–231. Accessed July 26, 2026. https://mzu.history.org.ua/index.php/MZU/article/view/429.