Amos, O., T. E Odetoye, and D. S. Ogunniyi. “Preparation and Characterization of Zinc Metal Soap from Shea Butter (Vitellaria Paradoxa)”. Journal of the Nigerian Society of Physical Sciences 3, no. 4 (November 29, 2021): 340–343. Accessed August 9, 2022. https://journal.nsps.org.ng/index.php/jnsps/article/view/238.