Kyrylych, Volodymyr, and Khrystyna Shparyk. “Global Economic Trends: A Study of Data from the Years 1961–2013”. Historia i Polityka, no. 30 (37) (November 13, 2019): 119–129. Accessed July 18, 2024. https://apcz.umk.pl/HiP/article/view/HiP.2019.040.