”In Vitro Antioxidant Properties of Methanolic Leaf Extract of Vernonia Amygdalina Del” (2021) Nigerian Journal of Physiological Sciences, 29(2), s. 091–101. Tillgänglig vid: https://ojshostng.com/index.php/njphysiologicalsciences/article/view/1812 (åtkomstdatum: 27 april 2026).