Bibliography (7):

1. Implementing Recommendations From Web Accessibility Guidelines: A Comparative Study of Nondisabled Users and Users With Visual Impairments

2. Web Site Delays: How Tolerant are Users?

3. The Effect of Ad Blocking on User Engagement with the Web

4. A Large-Scale Characterization of How Readers Browse Wikipedia

5. Wikipedia Bibliography:

   1. https://en.wikipedia.org/wiki/Checklist

      https://en.wikipedia.org/wiki/Checklist

   2. https://en.wikipedia.org/wiki/Web_accessibility

      https://en.wikipedia.org/wiki/Web_accessibility

   3. https://en.wikipedia.org/wiki/Web_Content_Accessibility_Guidelines#WCAG_2.0

      https://en.wikipedia.org/wiki/Web_Content_Accessibility_Guidelines#WCAG_2.0