Poplyuyko, Ya. V., and M. O. Melnyk. “Assessing the Level of Ukraine’s Shadow Economy Under Martial Law and Identifying Key Influencing Factors”. Statistics of Ukraine 109, no. 2 (August 24, 2025): 17–29. Accessed March 21, 2026. https://su-journal.com.ua/index.php/journal/article/view/477.