„In Vitro Antioxidant Properties of Methanolic Leaf Extract of Vernonia Amygdalina Del“ (2021) Nigerian Journal of Physiological Sciences, 29(2), str. 091–101. Dostupno na: https://www.ojshostng.com/index.php/njphysiologicalsciences/article/view/1814 (Pristupljeno: 5 travanj 2026).