1. Web Accessibility Initiative (WAI). Retrieved from https://www.w3.org/WAI/about/#world-wide-web-consortium-w3c-web-accessibility-initiative-wai Web Accessibility Initiative (WAI). Retrieved from https://www.w3.org/WAI/about/#world-wide-web-consortium-w3c-web-accessibility-initiative-wai
2. Web Content Accessibility Guidelines (WCAG) 2.1. Retrieved from https://www.w3.org/TR/WCAG21/ Web Content Accessibility Guidelines (WCAG) 2.1. Retrieved from https://www.w3.org/TR/WCAG21/
3. The World Wide Web Consortium (W3C). Retrieved from https://www.w3.org/Consortium/ The World Wide Web Consortium (W3C). Retrieved from https://www.w3.org/Consortium/
4. W3C Selecting Tools for Evaluation. Retrieved from https://www.w3.org/WAI/ER/tools/ W3C Selecting Tools for Evaluation. Retrieved from https://www.w3.org/WAI/ER/tools/
5. Fatima Ezzahra Chadli , Driss Gretete , and Aniss Moumen , ‘ Digital accessibility : A Systematic Literature Review ’, SHS Web of Conferences , vol. 119 , 2021 . Fatima Ezzahra Chadli, Driss Gretete, and Aniss Moumen, ‘Digital accessibility: A Systematic Literature Review’, SHS Web of Conferences, vol. 119, 2021.