Suansilpong, Apichat, and Petch Rawdaree. “Comparison between Single-field Nonmydriatic Digital Fundus Image and Gold Standard for Diabetic Retinopathy Screening”. Vajira Medical Journal : Journal of Urban Medicine 52, no. 2 (September 27, 2011): 83–91. accessed February 21, 2026. https://he02.tci-thaijo.org/index.php/VMED/article/view/335.