Olivier, Jana, Elize Symington, Cornelia Jonker, Isaac Rampedi, and Tersia van Eeden. “Comparison of the Mineral Composition of Leaves and Infusions of Traditional and Herbal Teas”. South African Journal of Science 108, no. 1/2 (January 24, 2012): 7 pages. Accessed May 4, 2024. https://sajs.co.za/article/view/9939.