„In Vitro Antioxidant Properties of Methanolic Leaf Extract of Vernonia Amygdalina Del“, NJPS, let. 29, št. 2, str. 091–101, maj 2021, Pridobljeno: 22. maj 2026. [Na spletu]. Dostopno na: http://ojshostng.com/index.php/njphysiologicalsciences/article/view/1814