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Temitope, Laniran, and Olayinka Ajala. "Military Expenditure and Economic Growth: Evidence from Nigeria." American Journal of Economics 11, no. 1 (2021): 10-18.

Ajala, Olayinka. "Formation of Insurgent Groups: MEND and Boko Haram in Nigeria." Small Wars & Insurgencies 29, no. 1 (2018): 112-130.

Ajala, Olayinka. "US Drone Base in Agadez." The RUSI Journal 163, no. 5 (2018): 20-27.