1. Arai, T., Nakano, Y., Yamamoto, R., Hayashi, K., Takata,Y., Handa, A., & Inoue, S. (2010). Development of a "Universal Design" Font with Blur Tolerance (2): A Comparison of the Readability of Ming, Gothic, and "Universal Design" Typefaces. In Proceedings of the 3rd International Conference for Universal Design. Hamamatsu: International Association for Universal Design (IAUD). Retrieved from https://web.econ.keio.ac.jp/staff/nakanoy/research/largeprint/03_kaken/2012/fig/IAUD2010-2.pdf
2. Viewing distance of smartphones in presbyopic and non-presbyopic age
3. Committee of Thai Font Standardization. (2001). In Thai Typeface (pp. 54-85). Bangkok: National Electronics and Computer Technology Center (NECTEC). (In Thai)
4. Digital Transformation Agency. (2023). Digital Service Standard: Supporting agencies to deliver simple and seamless digital services (Version 2.0). Retrieved from https://www.dta.gov.au/sites/default/files/2023-11/Digital%20Service%20Standard%202.pdf
5. Electronic Government Agency (Public Organization) (EGA). (n.d.). Government website standard version 2.0. Retrieved from https://standard.dga.or.th/wp-content/uploads/2021/05/มาตรฐานเว็บไซต์ภาครัฐ-เวอร์ชัน-2-1.pdf (in Thai)