Legibility vs Readability

Users won’t read web content unless the text is clear, the words and sentences are simple, and the information is easy to understand. You can test all of this.

Typographic Readability and Legibility
Envato Tutsplus
Legibility, Readability, and Comprehension: Making Users Read Your Words
Nielsen norman Group
Including Easy to Read, Legibility and Readability into Web Engineering
W3C
10 Principles For Readable Web Typography
Matt Cronin, Smashing Magazine
Typography and the Aging Eye: Typeface Legibility for Older Viewers with Vision Problems
AIGA
Designing Content for Readability, Legibility and Clarity
Mark Schenker. Awwwards
When Legibility, Readability & Usability Intersect, Then We Reach Our Target Audience
Suzanne Webb, MSU
It’s About Legibility
Alan Halley, Fonts.com