I. Mbaeyi-Nwaoha and V. Emejulu, “Evaluation of Phytochemical Composition and Antimicrobial Activity of Sweet Potato (Ipomoea batatas) Leaf”, Pak. J. Nutr., vol. 12, no. 6, pp. 575–586, May 2013, doi: 10.3923/pjn.2013.575.586.