Sabo, Tantasso, Aaron Joseph Zira, and Samaila Bulus. “Solar Radiation and Development of Human Skin Colours”. African Journal of Advances in Science and Technology Research 10, no. 1 (April 17, 2023): 110–118. Accessed October 27, 2026. https://publications.afropolitanjournals.com/index.php/ajastr/article/view/402.