Ustych, Serhii, Alex Rovt, i Svitlana Piasetska-Ustych. „A System Approach to Quantify Development of Modern Transborder Processes”. TRANSBORDER ECONOMICS. International Journal on Transborder Economics, Finance, Politics and Statistics. 1, no. 2 (listopad 4, 2023): 117–126. Udostępniono sierpień 24, 2024. https://journals.ur.edu.pl/te/article/view/8611.