A. . Kroso, N. Loganathan, Y. Subramaniam, and T. N. Mursitama, “THE INFLUENCE OF OIL PRICE FLUCTUATIONS AND MACROECONOMICS CONSEQUENCE ON DEFENSE EXPENDITURE IN AFRICAN OIL-RICH COUNTRIES”, IJBS, vol. 26, no. 2, pp. 730–749, Sep. 2025.