Yousefvand, Saman, Reza Najarzadeh, Hasan Heidari, and Lotfali Agheli. 2017. “Long-Run Trend and Determinants of Terms of Trade of Iran”. International Journal of Economics and Financial Issues 7 (2):714-22. https://econjournals.com/index.php/ijefi/article/view/3654.