Lawali, L., M. Maccido, and M. Attahiru. “Relationship Between Volatility in Domestic Oil Prices, International Oil Prices, and Exchange Rates: Co-Integration and Granger Causality Tests”. International Journal of Accounting Research, vol. 10, no. 2, Sept. 2025, pp. 91-95, doi:10.65453/ijar.v10i2.1318.