Gbatu, A. P., Z. Wang, P. K. Wesseh Jr., and I. Y. R. Tutdel. “Causal Effects and Dynamic Relationship Between Exchange Rate Volatility and Economic Development in Liberia”. International Journal of Economics and Financial Issues, vol. 7, no. 4, July 2017, pp. 119-31, https://econjournals.com/index.php/ijefi/article/view/4796.