"In Vitro Antioxidant Properties of Methanolic Leaf Extract of Vernonia Amygdalina Del" (2021) Nigerian Journal of Physiological Sciences, 29(2), ص 091–101. موجود في: https://www.ojshostng.com/index.php/njphysiologicalsciences/article/view/1812 (تاريخ الوصول: 6 أبريل 2026).