Usunomena, Usunobun, Egharevba M. Ewaen, and Ehiosun Kevin. 2020. “Comparative in Vitro Antioxidant Activity of Ethanol Extracts of Vernonia Amygdalina and Annona Muricata Leaves”. Nigerian Journal of Pharmaceutical and Applied Science Research 6 (1):37-42. https://nijophasr.net/index.php/nijophasr/article/view/163.