Keho, Yaya. “Revisiting the Financial Development and Poverty Reduction Nexus for Sub-Saharan African Countries: Evidence from Causality Tests in the Time and Frequency Domains”. International Journal of Economics and Financial Issues, vol. 6, no. 4, Oct. 2016, pp. 1906-10, https://econjournals.com./index.php/ijefi/article/view/2596.