Ustych, Serhii, Alex Rovt, and Svitlana Piasetska-Ustych. 2023. “A System Approach to Quantify Development of Modern Transborder Processes”. TRANSBORDER ECONOMICS. International Journal on Transborder Economics, Finance, Politics and Statistics. 1 (2):117-26. https://journals.ur.edu.pl/te/article/view/8611.