BAYRAMOĞLU, M. F., A. TAY BAYRAMOĞLU, and M. A. ERGÜN. “ASYMMETRIC CAUSALITY TEST IN MEAN AND IN VARIANCE OF EXCHANGE RATE AND OIL PRICES”. Business &Amp; Management Studies: An International Journal, vol. 7, no. 5, Dec. 2019, pp. 2112-23, doi:10.15295/bmij.v7i5.1319.