AMOAKO, Ebenezer. Regional competitiveness of selected Sub-Saharan African economies – an application of stochastic production frontier analysis. International Business and Global Economy, [S. l.], v. 39, p. 51–63, 2021. Disponível em: https://czasopisma.bg.ug.edu.pl/index.php/IBage/article/view/7474. Acesso em: 22 lip. 2024.