Jimoh, Sodiq, and Felix Olaifa. “Determinants of Intra Sub-Saharan African Trade: Evidence from ECOWAS and CEN-SAD Countries”. Pakistan Journal of Humanities and Social Sciences 8, no. 2 (December 31, 2020): 69-78. Accessed May 15, 2021. https://journals.internationalrasd.org/index.php/pjhss/article/view/164.