Shindo, Rikako. “EAST PRUSSIA, LITHUANIA AND THE SOVIET UNION AFTER THE FIRST WORLD WAR: THE FOREIGN STRATEGY OF A GERMAN EXCLAVE DURING THE 1920S”. Problems of World History, no. 1 (March 24, 2016): 131–146. Accessed April 26, 2024. https://journal.ivinas.gov.ua/pwh/article/view/128.