Poltorak, Volodymyr, and Olena Shinkarenko. 2015. “The Modeling Technologies in the Electoral Companies: «Downs’s paradoxes», «Olson’s paradoxes», «Voting»”. Visnyk of V. N. Karazin Kharkiv National University. Series "Sociological Studies of Contemporary Society: Methodology, Theory, methods", no. 1148 (November), 82-85. https://periodicals.karazin.ua/ssms/article/view/4474.