„In Vitro Antioxidant Properties of Methanolic Leaf Extract of Vernonia Amygdalina Del“ (2021) Nigerian Journal of Physiological Sciences, 29(2), стр. 091–101. Available at: https://ojshostng.com/index.php/njphysiologicalsciences/article/view/1812 (приступљено: 6 Април 2026).