Казанков, Р. (2016). The Ukrainian ethnic borders in the Black Sea region in the 1920-1930s Ukrainian social and political thought. V. N. Karazin Kharkiv National University Bulletin ‘History of Ukraine. Ukrainian Studies: Historical and Philosophical Sciences’, 21, 57-65. Retrieved from https://periodicals.karazin.ua/uahistory/article/view/6054