1. DIAGRAM Center. 2015. Image Description Guidelines. http://diagramcenter.org/table-of-contents-2.html DIAGRAM Center. 2015. Image Description Guidelines. http://diagramcenter.org/table-of-contents-2.html
2. DIAGRAM Center. 2022. Poet Image Description. https://poet.diagramcenter.org/index.html DIAGRAM Center. 2022. Poet Image Description. https://poet.diagramcenter.org/index.html
3. World Wide Web Consortium. 2022. Web Content Accessibility Guidelines (WCAG) Overview. https://www.w3.org/WAI/standards-guidelines/wcag/ World Wide Web Consortium. 2022. Web Content Accessibility Guidelines (WCAG) Overview. https://www.w3.org/WAI/standards-guidelines/wcag/
4. Team R Core. 2022. R Foundation for Statistical Computing. https://www.r-project.org/ Team R Core. 2022. R Foundation for Statistical Computing. https://www.r-project.org/
5. Increased Content Knowledge of Students with Visual Impairments as a Result of Extended Descriptions