Patrick Geoffroy Nkwenka Nyanda, and Yve Daniel Ngassa Nya. “Demographic Growth and Environment In Sub-Saharan Africa : An Analysis of the Panel Data on the 1980-2016 Period”. Global Journal of Human-Social Science, vol. 20, no. B2, May 2020, pp. 11-20, https://socialscienceresearch.org/index.php/GJHSS/article/view/3161.