Phumlek, K. ., A. Itharat, U. Saesiw, W. . Pipatrattanaseree, K. Piwngam, P. Sookdee, and N. M. . Davies. “Chemical and Biological Stability under Forced Degradation and Accelerated Storage Conditions of the Anti-Acne Formulation of Pra-Sa-Mang-Khud Ethanolic Extract”. Asian Medical Journal and Alternative Medicine, vol. 22, no. 3, Dec. 2022, pp. 185-93, https://asianmedjam.com/index.php/amjam/article/view/1269.