‘In Vitro Antioxidant Properties of Methanolic Leaf Extract of Vernonia Amygdalina Del’ (2021) Nigerian Journal of Physiological Sciences, 29(2), pp. 091–101. Beschikbaar op: https://ojshostng.com/index.php/njphysiologicalsciences/article/view/1814 (Geraadpleegd: 27 april 2026).