Egunyomi, A., T. R. Fasola, and O. Oladunjoye. “Charring Medicinal Plants: A Traditional Method of Preparing Phytomedicines in Southwestern Nigeria”. Ethnobotany Research and Applications, vol. 3, Dec. 2005, pp. 261-6, https://ethnobotanyjournal.org/index.php/era/article/view/76.