Matviyishyn, Yevhen. “Ukraine’s Population Compared to European Post-Communist Countries in 1990 and 2020”. Journal of Geography, Politics and Society 11, no. 4 (December 31, 2021): 46–54. Accessed July 22, 2024. https://czasopisma.bg.ug.edu.pl/index.php/JGPS/article/view/6591.