T. Kolawole, Oyetunji, et al. “Evaluation of Chronic Toxicity of Newbouldia Laevis Leaf Extract in Rats: doi.org 10.26538 Tjnpr V5i10.30”. Tropical Journal of Natural Product Research (TJNPR), vol. 5, no. 10, Oct. 2021, pp. 1889-95, https://tjnpr.org/index.php/home/article/view/393.