ARTYMYSHYN, Pavlo, and Ivan YAROMIY. “CUSTOMS SERVICE DURING THE UKRAINIAN REVOLUTION (1917 – 1923) IN UKRAINIAN HISTORIOGRAPHY”. EAST EUROPEAN HISTORICAL BULLETIN, no. 35 (June 26, 2025): 36–47. Accessed July 1, 2025. http://eehb.dspu.edu.ua/article/view/332650.