Lytovchenko, A., and O. Muradyan. “Social and Political Preconditions for Regional Divisions in Ukraine”. Visnyk of V. N. Karazin Kharkiv National University. Series "Sociological Studies of Contemporary Society: Methodology, Theory, methods", no. 1148, Nov. 2015, pp. 90-99, https://periodicals.karazin.ua/ssms/article/view/4476.