Zedan, Rami Ali. “Changes in Tax Revenue in Comparison With GDP at Current Prices in Syria (a 2000-to-2016 Study)”. Tishreen University Journal- Economic and Legal Sciences Series 42, no. 1 (March 5, 2020). Accessed May 21, 2024. https://journal.tishreen.edu.sy/index.php/econlaw/article/view/9507.