Lawali L, Maccido M, Attahiru M. Relationship between volatility in domestic oil prices, international oil prices, and exchange rates: Co-integration and granger causality tests. IJAR [Internet]. 2025 Sep. 20 [cited 2026 Jan. 31];10(2):91-5. Available from: https://j.arabianjbmr.com/index.php/ijar/article/view/1318