Olamoyegun, Michael A., et al. “Assessment of Pharmacodynamic Interactions and Toxicological Effects of Vernonia Amygydalina –Metformin Co-Administration on Streptozotocin-Induced Diabetic Wistar Rats: . Http: www.doi.org 10.26538 Tjnpr V6i12.29”. Tropical Journal of Natural Product Research (TJNPR), vol. 6, no. 12, Dec. 2022, pp. 2073-80, https://tjnpr.org/index.php/home/article/view/1412.