Mgbeje, Bob, Ezekiel Umoh, and Christine Emmanuel-Ikpeme. “Comparative Analysis of Phytochemical Composition of Four Selected Tropical Medicinal Plants Namely: Ocimum Gratissimum, Piper Guineense, Gongronema Latifolium and Vernonia Amygdalina”. Journal of Complementary and Alternative Medical Research 7, no. 3 (June 25, 2019): 1-11. Accessed December 16, 2019. http://journaljocamr.com/index.php/JOCAMR/article/view/30102.