1. Advances in Intelligent Systems and Computing;P Acosta-Vargas,2020
2. Acosta-Vargas, P., Luján-Mora, S., Acosta, T.: Accessibility of portable document format in education repositories. In: Proceedings of the 2017 9th International Conference on Education Technology and Computers, pp. 239–242 (2017)
3. Caldwell, B., Cooper, M., Reid, L.G., Vanderheiden, G., Chisholm, W., Slatin, J., White, J.: Web content accessibility guidelines (WCAG) 2.0. WWW Consortium (W3C) 290, pp. 1–34 (2008)
4. Consortium, W.W.W., et al.: Web content accessibility guidelines 1.0 (1999)
5. Lecture Notes in Computer Science;A Darvishy,2018