Forecasting Nigerian Inflation: A SARIMAX and Granger Causality Analysis of Exchange Rate and Crude Oil Price Impacts. International Journal of Development Mathematics (IJDM), [S. l.], v. 2, n. 4, p. 200–216, 2025. DOI: 10.62054/ijdm/0204.14. Disponível em: https://ijdm.org.ng/index.php/Journals/article/view/257.. Acesso em: 28 aug. 2026.