WAI-ARIA Authoring Practices 1.1
The difference between aria-label and aria-labelledby
Intro to Advanced ARIA
ARIA in HTML – “This specification defines the web developer rules (author conformance requirements) for the use of Accessible Rich Internet Applications (WAI-ARIA) 1.1 and Digital Publishing WAI-ARIA Module 1.0 attributes on [HTML] elements. It also defines requirements for Conformance Checking tools.”