Nzeh IC, Ogwuru HOR, Okolie DO, Okolie JI. Economic openness, institutional quality and per capita income: Evidence from the Economic Community of West African States (ECOWAS). REF [Internet]. 2023 Feb. 20 [cited 2024 Apr. 24];6(2):50–67. Available from: https://journals.ue.poznan.pl/REF/article/view/193