Lesnyak, Vitaliy. 2018. “Interaction Between Third Sektor and Public Administration in Regulation of Social Problems in Contemporary Poland”. Visnyk of V. N. Karazin Kharkiv National University. Series "Sociological Studies of Contemporary Society: Methodology, Theory, methods" 39 (February), 183-87. https://periodicals.karazin.ua/ssms/article/view/10194.