"Metal Contents and Acute Toxicity of Combined Vernonia Amygdalina Leaves and Garcinia Kola Seeds-VAGK, a Herbal and Nutritional Formulation in Male Wistar Rats". 2019. African Journal of Biomedical Research 22 (2): 187-94. https://ojshostng.com/index.php/ajbr/article/view/2260.