Agustiar, Memet, Fariastuti Djafar, and Afrizal Afrizal. 2017. “Construction of an Optimum Currency Area Index Anchored to the Gold Dinar: The Case of Selected Islamic Countries”. International Journal of Economics and Financial Issues 7 (3):51-56. https://www.econjournals.com/index.php/ijefi/article/view/4491.