Eyob, Ephrem, and Mulugeta S. Kahsai. “Relationships of Selected Key Logistics Factors and Logistics Performance Index of Sub-Saharan African Countries”. Journal of Applied Business and Economics 21, no. 6 (December 9, 2019). Accessed November 19, 2024. https://articlegateway.com/index.php/JABE/article/view/2401.