Thuangtong, A. ., P. Samsen, and . T. . Methalak. “Comparison of Accuracy in Measuring Refractive Error by Ophthalmology Residents Between Classical and Innovative Teaching Techniques”. Siriraj Medical Journal, vol. 64, no. 6, July 2020, pp. 183-7, https://he02.tci-thaijo.org/index.php/sirirajmedj/article/view/244194.