Sudyn, Danylo. 2019. “Factor Analysis of Categorical Data: Heuristic Potential of Categorical Principal Components Analysis”. Visnyk of V. N. Karazin Kharkiv National University. Series Sociological Studies of Contemporary Society: Methodology, Theory, Methods, no. 999 (August), 84-90. https://periodicals.karazin.ua/ssms/article/view/13924.