“In Vitro Antioxidant Properties of Methanolic Leaf Extract of Vernonia Amygdalina Del” (2021) Nigerian Journal of Physiological Sciences, 29(2), صص 091–101. قابل دسترس در: http://ojshostng.com/index.php/njphysiologicalsciences/article/view/1812 (دسترسی: 22 می 2026).