Alfred Maroyi. “A Systematic Review on Biological and Medicinal Properties of Ehretia Rigida (Thunb.) Druce (Ehretiaceae) in Southern Africa”. Plant Science Today 10, no. sp2 (September 23, 2023): 74–82. Accessed November 21, 2024. https://horizonepublishing.com/journals/index.php/PST/article/view/2359.