العربيد نضال, and جانم منهل. “Evaluating The Performance Of The International Investment Portfolio Of A Sample Of US Government Treasury Bonds Using The Return And Risk Model To Rationalize The Investment Decision ((An Analytical Study))”. Tishreen University Journal- Economic and Legal Sciences Series 43, no. 2 (May 9, 2021). Accessed July 27, 2024. https://journal.tishreen.edu.sy/index.php/econlaw/article/view/10523.