Roongruangchai, K. “Povidone-Iodine Induced Changes in the Cyst of Acanthamoeba spp.: Transmission Electron Microscopic Study”. Siriraj Medical Journal, vol. 60, no. 5, Nov. 2008, pp. 251-3, https://he02.tci-thaijo.org/index.php/sirirajmedj/article/view/246461.