Teker, D., S. Teker, and E. Aykac Alp. “Causal Relations Among Macroeconomic Variables under Various Exchange Rate Levels: An Implementation of Threshold Vector Autoregression Model”. International Journal of Economics and Financial Issues, vol. 8, no. 4, July 2018, pp. 177-84, https://econjournals.com/index.php/ijefi/article/view/6492.